Clĭnch1, v. t.
(66), v. t. [imp. & p. p. CLINCHED (klĭncht); p. pr. & vb. n. CLINCHING.] [Also clench, from O. Fr. clenche, clenque, clinke, Norm. Fr. clanche, N. Fr. clinche, latch, from Ger. klinke. See CLICK, n.]
Sense 1. To make, or hold, fast, by folding or embracing closely; to tighten by bending or folding together; to grasp; as, to clinch a nail, to make it fast by bending over the point; to clinch the fist.
Heroes whose dismembered hands yet bear The dart aloft, and clinch the pointed spear. Dryden.
Sense 2. To render firm; to make conclusive; to confirm; to establish; as, to clinch an argument.