/ Dictionary / Index B Boole's inequality: Meaning and Definition of Find definitions for: Boole's' inequal'ity Pronunciation: [key] — Math. Math. the theorem that the probability of several events occurring is less than or equal to the sum of the probabilities of each event occurring. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Boolean sum boom 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