/ Dictionary / Index R right brain: Meaning and Definition of Find definitions for: right' brain" Pronunciation: [key] the cerebral hemisphere on the right side of the corpus callosum, controlling activity on the left side of the body, showing in humans some degree of specialization for spatial and nonverbal concepts. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Right Bank right-branching Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language