/ Dictionary / Index L lullaby: Meaning and Definition of Find definitions for: lull•a•by Pronunciation: (lul'u-bī"), [key] — n., pl. v., -bies, -bied, -by•ing. —n. a song used to lull a child to sleep; cradlesong. any lulling song. —v.t. to lull with or as with a lullaby. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lullaby (Thesaurus) lull Lully Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language