/ Dictionary / Index T threshing machine: Meaning and Definition of Find definitions for: thresh'ing machine" Pronunciation: [key] — Agric. Agric. a machine for removing grains and seeds from straw and chaff. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thresher threshold Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language