/ Dictionary / Index L lightheaded: Meaning and Definition of Find definitions for: light•head•ed Pronunciation: (līt'hed'id), [key] — adj. giddy, dizzy, or delirious: After two drinks Pat began to feel lightheaded. having or showing a frivolous or volatile disposition; thoughtless: lightheaded persons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lightheaded (Thesaurus) light-handed lighthearted Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language