/ Dictionary / Index H heartstopper: Meaning and Definition of Find definitions for: heart•stop•per Pronunciation: (härt'stop"ur), [key] — n. something so frightening or emotionally gripping as to make one's heart seem to stop beating: We didn't crash, but it was a heartstopper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heartsore heartstrings Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language