/ Dictionary / Index T tetragon: Meaning and Definition of Find definitions for: tet•ra•gon Pronunciation: (te'tru-gon"), [key] — n. a polygon having four angles or sides; a quadrangle or quadrilateral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tetragon (Thesaurus) tetrafunctional tetragonal Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language