/ Dictionary / Index L lilac: Meaning and Definition of Find definitions for: li•lac Pronunciation: (lī'luk, -läk, -lak), [key] — n. any of various shrubs belonging to the genus Syringa, of the olive family, as S. vulgaris, having large clusters of fragrant purple or white flowers: the state flower of New Hampshire. pale reddish purple. —adj. having the color lilac. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lilac (Thesaurus) lila lilaceous Related Content Daily Word Quiz: tranquil Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language