Entry 5 senses · 4 variants Webster, 1913 Quash /kwôsh/ · IPA /kwɑʃ/ n. v. t. v. t. v. i. 01 n. Same as Squash. 1. Same as Squash. See: Squash 02 v. t. To abate, annul, overthrow, or make void; as, to quash an indictment. imp. & p. p. Quashed; p. pr. & vb. n. Quashing 1. To abate, annul, overthrow, or make void; as, to quash an indictment.(Law) 03 v. t. To beat down, or beat in pieces; to dash forcibly; to crush. 1. To beat down, or beat in pieces; to dash forcibly; to crush. “The whales Against sharp rocks, like reeling vessels, quashed, Though huge as mountains, are in pieces dashed.” — Waller. 2. To crush; to subdue; to suppress or extinguish summarily and completely; as, to quash a rebellion. “Contrition is apt to quash or allay all worldly grief.” — Barrow. 04 v. i. To be shaken, or dashed about, with noise. 1. To be shaken, or dashed about, with noise.