ILLINOIS DIVORCE AND FAMILY LAW TERMS, EXPLAINED CLEARLY

Aug 25, 2026

Illinois Divorce and Family Law Terms, Explained Clearly

Clear explanations of common legal terms you may hear during divorce, parenting, support, and family law matters.

Divorce and family law can come with unfamiliar terms, court phrases, and documents that are not always explained clearly. This guide is designed to help you understand common Illinois divorce and family law terms in plain language, so you know what they mean, when they may come up, and why they may matter.

Every family situation is different. These definitions are meant to provide general information, not legal advice for your specific case. If you have questions about how a term applies to your situation, your attorney can help you understand what it means in context.

Core Divorce Process Terms

Dissolution of Marriage

Direct definition:

Dissolution of Marriage is the legal term Illinois uses for divorce.

What this means in real life:

When people say they are getting divorced, the court process is formally called a dissolution of marriage. This is the legal process used to end a marriage and resolve related issues such as property, support, parenting time, and decision-making responsibilities.

When you may hear this term:

You may see this term in court documents, including the Petition for Dissolution of Marriage and the Judgment for Dissolution of Marriage.

Petition for Dissolution

Direct definition:

A Petition for Dissolution is the document that formally asks the court to begin a divorce case.

What this means in real life:

This document starts the legal process. It does not mean every issue has been decided. It tells the court that one spouse is seeking a divorce and identifies the general issues that may need to be addressed.

When you may hear this term:

You may hear this term when your case is first being prepared, filed, or served on the other spouse.

Petitioner

Direct definition:

The Petitioner is the person who files the initial paperwork to start the divorce case.

What this means in real life:

Being the Petitioner does not give someone an advantage. It simply means that person started the court process.

When you may hear this term:

You may see this term in the case caption at the top of court documents.

Respondent

Direct definition:

The Respondent is the other spouse who receives the divorce paperwork and has an opportunity to respond.

What this means in real life:

The Respondent is formally notified that the case has been filed. They may then file an appearance, response, or other documents depending on the circumstances.

When you may hear this term:

You may hear this term after the case is filed or when the other party is served. You may see this term in the case caption at the top of court documents.

Summons

Direct definition:

A Summons is a court document that officially notifies someone that a case has been filed and that they have a deadline to respond.

What this means in real life:

A Summons is part of formal notice. It helps make sure the other party knows the case exists and understands that a response may be required.

When you may hear this term:

You may hear this term when the case is filed and service is being arranged.

Service

Direct definition:

Service is the formal process of delivering court papers to the other party.

What this means in real life:

Service makes sure the other party has official notice of the case. Sometimes this happens cooperatively. In other situations, formal service by a sheriff or process server may be needed.

When you may hear this term:

You may hear this term after the Petition for Dissolution has been filed.

Appearance

Direct definition:

An Appearance is a court filing that identifies who is participating in the case and, when applicable, who represents them.

What this means in real life:

When an attorney files an appearance, it means that attorney is officially representing that party in the case. From that point forward, communication generally goes through the attorneys.

When you may hear this term:

You may hear this term when opposing counsel enters the case.

Status Date

Direct definition:

A Status Date is a court date where the judge checks on the progress of the case.

What this means in real life:

A status date is usually not a trial. It is often used to update the court on what has happened, what is still pending, and what needs to happen next.

When you may hear this term:

You may hear this term when the court sets a future date to check progress on discovery, mediation, negotiations, or other pending issues.

Pretrial

Direct definition:

A Pretrial is a court setting where the judge and attorneys discuss the case, the remaining issues, and possible paths toward resolution.

What this means in real life:

A pretrial can help move a case toward settlement, but it does not automatically mean the divorce will be finalized that day. Your attorney will explain whether you need to attend, what issues are being discussed, and what may happen next.

When you may hear this term:

You may hear this term when the case has unresolved issues and the court wants to help narrow or resolve them before trial.

Prove-Up

Direct definition:

A Prove-Up is the final court step where the divorce is presented to the judge for approval.

What this means in real life:

If the parties have reached agreements and the required documents are complete, the judge may review the final terms and enter the divorce judgment. This is often the day the divorce becomes final.

When you may hear this term:

You may hear this term after agreements have been reached and final documents are ready for court approval.

Judgment for Dissolution of Marriage

Direct definition:

A Judgment for Dissolution of Marriage is the final court order that legally ends the marriage.

What this means in real life:

This document finalizes the divorce. It may incorporate other agreements or orders that address property, support, parenting time, and decision-making responsibilities.

When you may hear this term:

You may hear this term near the end of the case, especially when final documents are being prepared or submitted to the court.

Marital Settlement Agreement

Direct definition:

A Marital Settlement Agreement is a written agreement that explains how financial and property issues will be resolved in a divorce.

What this means in real life:

This agreement may address assets, debts, retirement accounts, maintenance, real estate, taxes, and other financial issues. It should be reviewed carefully because it can affect your financial future long after the case is over.

When you may hear this term:

You may hear this term during settlement discussions or when final divorce documents are being prepared.

Discovery

Direct definition:

Discovery is the process of exchanging information and documents during a court case.

What this means in real life:

Discovery helps both sides understand the financial and factual issues involved. This may include bank statements, tax returns, retirement account information, credit card statements, business records, and other documents.

When you may hear this term:

You may hear this term after the case is underway and both sides begin gathering information.

Mediation

Direct definition:

Mediation is a process where a neutral third party helps people try to reach agreements outside of trial.

What this means in real life:

Mediation can be used for parenting issues, financial issues, or both. It can be helpful because it allows the parties to work toward practical agreements instead of leaving every decision to the court. Mediation does not mean every issue will be resolved, but it can help narrow the issues and reduce unnecessary conflict.

When you may hear this term:

You may hear this term when parenting issues are disputed, settlement discussions are ongoing, or the court wants the parties to try resolving issues before further litigation.

Trial

Direct definition:

A Trial is a formal court hearing where a judge hears evidence and makes decisions on unresolved issues.

What this means in real life:

Most divorce cases do not go to trial, but some do. If trial becomes necessary, preparation matters. Trial may involve testimony, exhibits, witnesses, and legal arguments.

When you may hear this term:

You may hear this term when settlement is not possible and the court needs to decide the remaining issues.

Parenting Terms

Custody

Direct definition:

Custody is the older term many people still use when talking about parenting rights, decision-making, and time with children after divorce or separation.

What this means in real life:

In Illinois, courts now use terms like allocation of parental responsibilities, decision-making authority, and parenting time instead of custody. People may still ask about “custody” because it is familiar, but the legal conversation is usually about who makes major decisions for the child and what parenting schedule supports the child’s best interests.

When you may hear this term:

You may hear this term when talking with friends, family, or online resources. In court documents and attorney conversations, you are more likely to hear allocation of parental responsibilities, parenting time, parenting plan, or decision-making authority.

Parenting Time

Direct definition:

Parenting Time refers to the schedule for when a child spends time with each parent.

What this means in real life:

Parenting time is about the day-to-day schedule. It may include weekdays, weekends, holidays, school breaks, vacations, transportation, and other practical details that affect family life.

When you may hear this term:

You may hear this term when discussing where children will be, when they will be with each parent, and how the schedule will work in real life.

Allocation of Parental Responsibilities

Direct definition:

Allocation of Parental Responsibilities is the Illinois term for how parenting decisions and parenting time are assigned between parents.

What this means in real life:

This term replaced older custody language in Illinois. It generally includes decision-making responsibilities and parenting time. The goal is to create a structure that supports the child’s best interests and gives parents clear expectations.

When you may hear this term:

You may hear this term in parenting cases, divorce cases involving children, parenting plans, and court orders.

Decision-Making Authority

Direct definition:

Decision-Making Authority refers to who has the right to make major decisions for a child.

What this means in real life:

Major decisions may involve education, healthcare, religion, and extracurricular activities. Decision-making authority is separate from parenting time, so the schedule and decision-making structure may not always be the same.

When you may hear this term:

You may hear this term when creating a parenting plan or discussing the allocation of parental responsibilities.

Parenting Plan

Direct definition:

A Parenting Plan is a written plan that explains how parents will share parenting time and decision-making responsibilities.

What this means in real life:

A parenting plan should be practical. It may include regular schedules, holidays, transportation, communication expectations, decision-making rules, and how future disputes will be handled.

When you may hear this term:

You may hear this term when parents are working toward agreement or when the court requires a proposed parenting structure.

Allocation Judgment

Direct definition:

An Allocation Judgment is a court order that sets parenting time and parental decision-making responsibilities.

What this means in real life:

This document becomes part of the final parenting structure. It explains how parenting responsibilities are allocated and should be specific enough to reduce confusion after the case is over.

When you may hear this term:

You may hear this term when final parenting documents are being drafted or entered by the court.

Guardian ad Litem

Direct definition:

A Guardian ad Litem, often called a GAL, is an attorney appointed by the court to help evaluate what may be in a child’s best interests.

What this means in real life:

A GAL may speak with parents, children, attorneys, and other relevant people before making recommendations to the court. Once a GAL is involved, the process often becomes more structured because the court is gathering additional information about what may be in the child’s best interests. It is important to understand the GAL’s role, what information they may consider, and how their involvement can affect the next steps in the case.

When you may hear this term:

You may hear this term when parents disagree about parenting time, decision-making, or other child-related issues.

Best Interests of the Child

Direct definition:

Best Interests of the Child is the legal standard courts use when making decisions about parenting time and parental responsibilities.

What this means in real life:

This standard focuses on what supports the child’s well-being, stability, and needs. Parents may have strong feelings about what is fair to them, but the court’s focus is on the child.

When you may hear this term:

You may hear this term in parenting disputes, GAL matters, mediation, and court hearings involving children.

Co-Parenting Course

Direct definition:

A Co-Parenting Course is an educational program parents may be required to complete during a divorce or parenting case.

What this means in real life:

The course is designed to help parents understand how separation and divorce may affect children and how to reduce unnecessary conflict. Completion may be required before certain issues can be finalized.

When you may hear this term:

You may hear this term after a divorce or parenting case involving children is filed.

Financial Terms

Financial Affidavit

Direct definition:

A Financial Affidavit is a sworn document that lists income, expenses, assets, debts, and other financial information.

What this means in real life:

This document helps create a clearer picture of the financial situation. It is important to be accurate and complete because financial decisions depend on reliable information.

When you may hear this term:

You may hear this term when financial disclosure begins or when support, attorney’s fees, or other financial issues are being addressed.

Maintenance

Direct definition:

Maintenance is financial support that one spouse may be required to pay to the other during or after a divorce. It is sometimes referred to as spousal support and was formerly called alimony.

What this means in real life:

Maintenance is not automatic in every divorce. Whether it applies depends on several factors, including income, length of the marriage, financial need, earning capacity, and the overall circumstances of the case. It is designed to address financial imbalance between spouses, not to punish either person.

When you may hear this term:

You may hear this term when discussing income differences, support, settlement options, or financial planning during divorce.

Child Support

Direct definition:

Child Support is financial support paid for the benefit of a child.

What this means in real life:

Child support is based on financial and parenting factors. It is intended to help cover a child’s needs, but it may not cover every child-related expense. Additional costs may still need to be addressed.

When you may hear this term:

You may hear this term when parenting time, income, healthcare costs, childcare, or other child-related expenses are discussed.

Marital Property

Direct definition:

Marital Property generally refers to property acquired during the marriage.

What this means in real life:

Marital property may include bank accounts, retirement accounts, real estate, vehicles, businesses, investments, debts, and other assets. The name on the account or title does not always determine whether something is marital.

When you may hear this term:

You may hear this term during financial disclosure, settlement discussions, or property division.

Non-Marital Property

Direct definition:

Non-Marital Property generally refers to property that belongs to one spouse separately and is not divided as marital property.

What this means in real life:

Examples may include certain inheritances, gifts, or property owned before the marriage, depending on how the property was handled. These issues can be fact-specific, so it is important to review them carefully.

When you may hear this term:

You may hear this term when discussing inheritance, premarital assets, separate accounts, or disputed property claims.

Equitable Distribution

Direct definition:

Equitable Distribution means marital property is divided fairly, though not always equally.

What this means in real life:

A fair division does not always mean a 50/50 split in every category. The court may consider several factors when determining how marital property and debt should be divided.

When you may hear this term:

You may hear this term during property division discussions or settlement negotiations.

Dissipation

Direct definition:

Dissipation refers to the improper use of marital assets for a purpose unrelated to the marriage after the marriage has begun breaking down.

What this means in real life:

Dissipation may come up when one spouse believes the other spent, transferred, or used marital money in a way that should be addressed during the divorce.

When you may hear this term:

You may hear this term during financial discovery or when reviewing spending patterns.

Retirement Division

Direct definition:

Retirement Division is the process of dividing retirement assets during divorce.

What this means in real life:

Retirement accounts can be a major part of the marital estate. The type of account matters, and some accounts require specific documents or steps to divide them correctly.

When you may hear this term:

You may hear this term during settlement discussions, financial review, or final document preparation.

Business Valuation

Direct definition:

Business Valuation is the process of determining the value of a business or business interest.

What this means in real life:

If one or both spouses own a business, the value of that business may need to be evaluated during divorce. This can affect settlement discussions, property division, and long-term financial planning.

When you may hear this term:

You may hear this term when a spouse owns a company, partnership interest, professional practice, or closely held business.

QDRO

Direct definition:

A QDRO, or Qualified Domestic Relations Order, is a court order used to divide certain retirement accounts.

What this means in real life:

Some retirement accounts cannot be divided properly with only a divorce judgment or settlement agreement. A QDRO may be needed so the retirement plan can process the division correctly.

When you may hear this term:

You may hear this term after settlement terms are reached or when retirement accounts are being divided.

Helpful Court and Case Terms

Temporary Relief

Direct definition:

Temporary Relief refers to court orders that address immediate issues while the case is still pending.

What this means in real life:

A divorce can take time, and some issues cannot wait until the end. Temporary relief may address support, parenting schedules, use of property, attorney’s fees, or other short-term needs.

When you may hear this term:

You may hear this term when something needs to be resolved before the final divorce.

Order of Protection

Direct definition:

An Order of Protection is a court order intended to protect a person from abuse, harassment, intimidation, or other unsafe conduct.

What this means in real life:

Safety concerns can change the way a family law case moves forward. If an order of protection is involved, it may affect communication, parenting time, housing, and court procedures.

When you may hear this term:

You may hear this term when there are safety concerns or allegations of abuse.

Agreed Order

Direct definition:

An Agreed Order is a court order entered when the parties agree on a specific issue.

What this means in real life:

An agreed order allows the parties to resolve a specific matter without requiring the judge to decide it after a contested hearing. Once entered, it becomes a court order.

When you may hear this term:

You may hear this term when attorneys reach an agreement on a temporary or specific issue during the case.

Court Order

Direct definition:

A Court Order is a written direction from the judge that must be followed.

What this means in real life:

Court orders may address deadlines, parenting time, financial obligations, discovery, support, or final agreements. Once entered, a court order is not a suggestion.

When you may hear this term:

You may hear this term throughout the case whenever the judge enters written instructions or rulings.

Motion

Direct definition:

A Motion is a written request asking the court to make a decision or take action.

What this means in real life:

A motion is used when someone needs the court to address an issue. Some motions are routine. Others involve contested issues that may require a response or hearing.

When you may hear this term:

You may hear this term when an issue needs court attention before the case is resolved.

Notice of Filing

Direct definition:

A Notice of Filing is a document that tells the parties that something has been filed with the court.

What this means in real life:

This notice helps keep everyone informed about documents being added to the court record. It does not always mean immediate action is required, but it should be reviewed.

When you may hear this term:

You may hear this term when paperwork is filed by either side.

Settlement Conference

Direct definition:

A Settlement Conference is a meeting focused on trying to resolve disputed issues before trial.

What this means in real life:

A settlement conference may involve attorneys, parties, and sometimes the judge or another neutral professional. The goal is to identify what can be resolved and what remains disputed.

When you may hear this term:

You may hear this term when the case is moving toward resolution but certain issues remain unresolved.

Uncontested Divorce

Direct definition:

An Uncontested Divorce is a divorce where the spouses agree on all required issues.

What this means in real life:

Even when a divorce is uncontested, the required documents still need to be prepared correctly and approved by the court. Agreement can simplify the process, but it does not remove every required step.

When you may hear this term:

You may hear this term when both spouses are aligned on parenting, financial, property, and support issues.

Contested Divorce

Direct definition:

A Contested Divorce is a divorce where the spouses do not agree on one or more required issues.

What this means in real life:

A contested divorce does not always mean the case will go to trial. It means there are issues that still need to be resolved through negotiation, mediation, court involvement, or trial if necessary.

When you may hear this term:

You may hear this term when there are unresolved disputes about parenting, support, property, debt, or other important issues.