/ Dictionary / Index C completer set: Meaning and Definition of Find definitions for: complet'er set" Pronunciation: [key] a set of supplementary pieces that completes a set of dishes, as creamer, sugar bowl, platter, gravy boat, and vegetable dish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. complete quadrilateral completing the square 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