/ Dictionary / Index L lighthearted: Meaning and Definition of Find definitions for: light•heart•ed Pronunciation: (līt'här'tid), [key] — adj. carefree; cheerful; gay: a lighthearted laugh. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lighthearted (Thesaurus) lightheaded light heavyweight Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language