CLINCH Meaning of CLINCH in English I . v. a. 1.Grasp, grip, clasp, clutch, grapple, lay hold of.2.Fasten, secure.3.Confirm, fix, establish. II . n. 1.Catch, grip, clutch, grasp.2.Clincher, cramp, holdfast, clamp. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012