/ Dictionary / Index L lacunar: Meaning and Definition of Find definitions for: la•cu•nar Pronunciation: (lu-ky'nur), [key] — n., pl. adj. la•cu•nars, lac•u•nar•i•a —n. a coffered vault, ceiling, or soffit. coffer (def. 4). —adj. lacunal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lacunal lacunose Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language