Entry 2 senses Webster, 1913 Trenchant /trĕn'-chənt/ · Trench·ant · IPA /ˈtɹɛnʃənt/ 01 a. Fitted to trench or cut; gutting; sharp. 1. Fitted to trench or cut; gutting; sharp. 2. Fig.: Keen; biting; severe; as, trenchant wit.