/ Dictionary / Index T thresh: Meaning and Definition of Find definitions for: thresh Pronunciation: (thresh), [key] — v.t. to separate the grain or seeds from (a cereal plant or the like) by some mechanical means, as by beating with a flail or by the action of a threshing machine. to beat as if with a flail. —v.i. to thresh wheat, grain, etc. to deliver blows as if with a flail. See(def. 8). —n. the act of threshing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thresh (Thesaurus) threonine thresher Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language