/ Dictionary / Index H heartburn: Meaning and Definition of Find definitions for: heart•burn Pronunciation: (härt'bûrn"), [key] — n. an uneasy burning sensation in the stomach, typically extending toward the esophagus, and sometimes associated with the eructation of an acid fluid. bitter jealousy; envy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heartburn (Thesaurus) heartbroken heartburning Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language