/ Dictionary / Index B behavioral science: Meaning and Definition of Find definitions for: behav'ioral sci'ence Pronunciation: [key] a science or branch of learning, as psychology or sociology, that derives its concepts from observation of the behavior of living organisms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. behavior behaviorism 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