subs. (old: now recognised).Devastation; waste.
1607. SHAKESPEARE, Julius Cæsar, iii. 1. Cry HAVOCK, and let slip the dogs of war.
c. 1696. B. E., A New Dictionary of the Canting Crew, s.v. They made sad HAVOCK, they Destroyd all before em.
1725. A New Canting Dictionary, s.v.