/ Dictionary / Index U underdone: Meaning and Definition of Find definitions for: un•der•done Pronunciation: (un'dur-dun'), [key] — adj. (of food) not thoroughly cooked; not cooked enough. (of meat) rare. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underdone (Thesaurus) underdog underdraft 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