/ Dictionary / Index F flexagon: Meaning and Definition of Find definitions for: flex•a•gon Pronunciation: (flek'su-gon"), [key] — n. a three-dimensional figure having polygonal faces that is constructed from a folded sheet of paper in such a way that different faces are exposed when the figure is flexed along its folds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. flex flexdollars Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language