Entry 2 senses Webster, 1913 Quitch /(kwĭch)/ · IPA /kwɪt͡ʃ/ 01 n. Same as Quitch grass. 1. Same as Quitch grass.(Bot.) See: Quitch grass 2. Figuratively: A vice; a taint; an evil. “To pick the vicious quitch Of blood and custom wholly out of him.” — Tennyson.