/ Dictionary / Index C completion: Meaning and Definition of Find definitions for: com•ple•tion Pronunciation: (kum-plē'shun), [key] — n. the act of completing. the state of being completed. conclusion; fulfillment: Her last novel represented the completion of her literary achievement. a forward pass that has been completed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: completion (Thesaurus) completing the square complex Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language