/ Dictionary / Index P probability distribution: Meaning and Definition of Find definitions for: probabil'ity distribu"tion Pronunciation: [key] — Statistics. Statistics. a distribution of all possible values of a random variable together with an indication of their probabilities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. probability density function probability theory Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language