CLENCH Meaning of CLENCH in English v. & n. --v.tr. 1. close (the teeth or fingers) tightly. 2 grasp firmly. 3 CLINCH v. 4. --n. 1. a clenching action. 2 a clenched state. Etymology: OE f. Gmc: cf. CLING Oxford English vocab. Оксфордский английский словарь. 2012