/ Dictionary / Index A athlete's heart: Meaning and Definition of Find definitions for: ath'lete's heart' Pronunciation: [key] nonpathological enlargement of the heart resulting from intensive aerobic exercise. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. athlete's foot athletic Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language