/ Dictionary / Index B Bayesian: Meaning and Definition of Find definitions for: Bayes•i•an Pronunciation: (bā'zē-un, -zhun), [key] — adj. Statistics. of or pertaining to statistical methods that regard parameters of a population as random variables having known probability distributions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bayesian (Thesaurus) Bayern Bayes' theorem 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