/ Dictionary / Index U underrate: Meaning and Definition of Find definitions for: un•der•rate Pronunciation: (un"dur-rāt'), [key] — -rat•ed, -rat•ing. to rate or evaluate too low; underestimate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underrate (Thesaurus) underquote underreact Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language