/ Dictionary / Index U underused: Meaning and Definition of Find definitions for: un•der•used Pronunciation: (un"dur-yzd'), [key] — adj. not completely or sufficiently used: underused talents. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undertrump underutilize Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language