/ Dictionary / Index C check mark: Meaning and Definition of Find definitions for: check' mark". Pronunciation: [key] check (def. 34). check•mark Pronunciation: (chek'märk"), [key] — v.t. to indicate by a check mark. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. checklist checkmate Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language