/ Dictionary / Index U undervest: Meaning and Definition of Find definitions for: un•der•vest Pronunciation: (un'dur-vest"), [key] — n. Brit. an undershirt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undervalue underwaist Related Content Daily Word Quiz: dispel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language