/ Dictionary / Index O overbank: Meaning and Definition of Find definitions for: o•ver•bank Pronunciation: (ō"vur-bangk'), [key] — v.i. Horol. to have the balance staff oscillate so greatly that the fork of the lever fails to engage, rendering the escapement inoperative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. overbalance overbear Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language