/ Dictionary / Index C conditional probability: Meaning and Definition of Find definitions for: condi'tional probabil'ity Pronunciation: [key] the probability that an event will occur under the condition that another event occurs first: equal to the probability that both will occur divided by the probability that the first will occur. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. conditional operation conditional sale Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language