/ Dictionary / Index C complete quadrilateral: Meaning and Definition of Find definitions for: complete' quadrilat'eral Pronunciation: [key] — Geom. Geom. a plane figure composed of four straight lines and their points of intersection. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. complete metamorphosis completer set 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