/ Dictionary / Index B ballism: Meaning and Definition of Find definitions for: bal•lism Pronunciation: (bal'iz-um), [key] — n. Pathol. a condition characterized by twisting, shaking, and jerking motions. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Balliol ballista Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language