/ Dictionary / Index L Laplace: Meaning and Definition of Find definitions for: La•place Pronunciation: (la-plas'), [key] 1749–1827, French astronomer and mathematician. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: laplace (Thesaurus) lap joint Laplace equation Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language