/ Dictionary / Index C cooperate: Meaning and Definition of Find definitions for: co•op•er•ate Pronunciation: (kō-op'u-rāt"), [key] — -at•ed, -at•ing. to work or act together or jointly for a common purpose or benefit. to work or act with another or other persons willingly and agreeably. to practice economic cooperation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cooperate (Thesaurus) cooperage cooperation Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language