/ Dictionary / Index B Borel-Lebesgue theorem: Meaning and Definition of Find definitions for: Bo•rel'-Le•besgue' the"orem Pronunciation: (bô-rel'lu-beg', bu-), [key] — Math. Math. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Borel Borelli Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language