/ Dictionary / Index B behaviorism: Meaning and Definition of Find definitions for: be•hav•ior•ism Pronunciation: (bi-hāv'yu-riz"um), [key] — n. Psychol. the theory or doctrine that human or animal psychology can be accurately studied only through the examination and analysis of objectively observable and quantifiable behavioral events, in contrast with subjective mental states. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: behaviorism (Thesaurus) behavioral science behavior modification 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