A 'limit' in a court case is a rule that sets a deadline for taking a required legal action, such as filing a lawsuit or responding to a claim.
In legal procedure, a limit is a fixed period established by law within which a party must act—for example, to start a case or to file a motion. These limits appear in rules governing when a claim can be brought (often called a statute of limitations) or when a response must be served after being sued.
If you miss a limit, the court will likely dismiss your case or prevent you from raising a defense, regardless of the merits. Knowing the applicable limit helps you avoid losing your rights simply because you acted too late.
Many people think a limit starts when they first learn of a problem, but the legal start date can be different (e.g., when the injury occurred, not when discovered). Also, limits are not the same for every type of claim—they vary widely.
Get the actual rule
This page explains the concept. When it matters to your case, read the rule that governs it in your court — we hold Texas, federal and Washington court rules word for word, and every state's official resources are on the state pages. If someone cites a case at you, check that it exists first.
Related
General explanation, not legal advice, and not specific to any state — procedures and deadlines vary by jurisdiction and court. If you can get a lawyer or free legal aid, do: every real option.