/ Dictionary / Index C concuss: Meaning and Definition of Find definitions for: con•cuss Pronunciation: (kun-kus'), [key] — v.t. to injure by concussion: He was mildly concussed by the falling books. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: concuss (Thesaurus) concurring opinion concussion Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language