/ Dictionary / Index C couch grass: Meaning and Definition of Find definitions for: couch' grass" Pronunciation: (kouch, kch), [key] any of various grasses, esp. Agropyron repens, known chiefly as troublesome weeds and characterized by creeping rootstocks that spread rapidly. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. couchette couching Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language