1. the quality or state of being moot; open to debate or discussion; not settled or decided
Usage: often used in legal contexts to describe a case or issue that is no longer relevant or actionable
2. the quality of being irrelevant or having no practical significance
Usage: common in legal and academic discourse

Examples

• The mootness of the question became apparent once new evidence emerged.
• The court dismissed the case on grounds of mootness because the plaintiff had already graduated.
• Whether we should have taken that route is now a matter of mootness since we've already arrived.
• The mootness of the debate was highlighted when circumstances changed dramatically.
• Legal scholars discussed the mootness doctrine and its application to ongoing disputes.
• The issue's mootness made further discussion seem pointless.