/ Dictionary / Index L Laplace equation: Meaning and Definition of Find definitions for: Laplace' equa"tion Pronunciation: [key] — Math. Math. the second-order partial differential equation indicating that the Laplace operator operating on a given function results in zero. Cf. harmonic (def. 4c). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Laplace Laplace transform 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