flinch(noun, verb) noun1. a reflex response to sudden painSimilar word(s): winceDefinition categories: act, jump, start, startleSentences with flinch as a noun:- My eye doctor hates the flinch I have every time he tries to get near my eyes. verb1. draw back, as with fear or pain- she flinched when they showed the slaughtering of the calfSimilar word(s): cringe, funk, quail, recoil, shrink, squinch, winceDefinition categories: motion, move