#1 clench v. [clinch] hold in a tight grasp; "clench a steering wheel". wn
#2 clench v. squeeze together tightly; "clench one's jaw". wn
#3 clench n. [clinch] a small slip noose made with seizing. wn
#4 clench n. [clasp, clutch, clutches, grasp, grip, hold] the act of grasping; "he released his clasp on my arm"; "he has a strong grip for an old man"; "she kept a firm hold on the railing". wn
vizzz