/ Dictionary / Index L lapis lazuli: Meaning and Definition of Find definitions for: lap•is laz•u•li Pronunciation: (lap'is laz'oo-lē, -lī", laz'yoo-, lazh'oo-), [key] a deep-blue mineral composed mainly of lazurite with smaller quantities of other minerals, used mainly as a gem or as a pigment. a sky-blue color; azure. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lapis lap joint Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language