/ Dictionary / Index U underwhelm: Meaning and Definition of Find definitions for: un•der•whelm Pronunciation: (un"dur-hwelm', -welm'), [key] — v.t. Informal. to fail to interest or astonish: After all the ballyhoo, most critics were underwhelmed by the movie. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. underwent underwing 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