/ Dictionary / Index U underestimate: Meaning and Definition of Find definitions for: un•der•es•ti•mate Pronunciation: (v.un"dur-es'tu-māt"n.un"dur-es'tu-mit, -māt"), [key] — v., n. -mat•ed, -mat•ing, —v.t. to estimate at too low a value, rate, or the like. —v.i. to make an estimate lower than that which would be correct. —n. an estimate that is too low. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underestimate (Thesaurus) underendowed underexpose 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