否决 (fǒu jué) is a formal verb meaning 'to veto' — to officially reject a proposal, decision, or bill. The character 否 means 'no' or 'negation', and 决 means 'to decide' or 'to determine'; together, they literally convey 'to decide negatively'. This term is most commonly used in political, legal, and organizational contexts, such as legislative bodies, corporate boards, or international treaties.

否决 carries strong authoritative weight and implies finality and institutional power. It is rarely used in casual speech or personal situations. While it can be transitive (e.g., 否决提案), it often appears with objects like 法案 (bill), 提案 (proposal), 或 决议 (resolution). Unlike the more general 拒绝 (to refuse), 否决 specifically denotes an official, binding rejection by someone or some body with legitimate authority.