In plain English: “Dissolution of marriage” is the official legal name for divorce in Illinois. When you file for divorce in this state, you file a “Petition for Dissolution of Marriage.”
What this means for you: Court documents, websites, and lawyers will use “dissolution” instead of “divorce.” They mean the same thing — the legal ending of your marriage. Knowing this one word saves a lot of confusion when you read your paperwork.
What it looks like in practice: You don’t have to prove fault. Illinois is a no-fault state, so the only ground you need is that “irreconcilable differences” have caused the breakdown of the marriage. That means you don’t have to air dirty laundry or assign blame to get divorced — the court only needs to find the marriage is irreretrievably broken.
Watch out for: “dissolution” is sometimes confused with “legal separation” or “annulment,” which are different outcomes. Dissolution ends the marriage; a legal separation leaves it intact but divides property and parenting; an annulment treats the marriage as if it never happened. Make sure the document you’re signing matches the result you actually want.