/ Dictionary / Index L Lebesgue integral: Meaning and Definition of Find definitions for: Lebesgue' in"tegral Pronunciation: [key] — Math. Math. an integral obtained by application of the theory of measure and more general than the Riemann integral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lebesgue lebkuchen 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