/ Dictionary / Index L liliaceous: Meaning and Definition of Find definitions for: lil•i•a•ceous Pronunciation: (lil"ē-ā'shus), [key] — adj. of or like the lily. belonging to the plant family Liliaceae. Cf. lily family. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: liliaceous (Thesaurus) Lili lilied Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language