/ Dictionary / Index F flex: Meaning and Definition of Find definitions for: flex Pronunciation: (fleks), [key] — v.t. to bend, as a part of the body: He flexed his arms to show off his muscles. to tighten (a muscle) by contraction. —v.i. to bend. —n. the act of flexing. any flexible, insulated electric cord; an electric cord or extension cord. Slang.an elastic band, as a garter. an inflection point. flex Pronunciation: (fleks), [key] — adj. flexible: a flex program of workers' benefits. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: flex (Thesaurus) flews flexagon Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language