overbank: Meaning and Definition of

o•ver•bank

Pronunciation: (ō"vur-bangk'), [key]
— v.i. Horol.
  1. 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.