Pronunciation: (hav'uk), [key]
—n., v., -ocked, -ock•ing.
1. great destruction or devastation; ruinous damage.
2. cry havoc, to warn of danger or disaster.
3. play havoc with,
a. to create confusion or disorder in: The wind played havoc with the papers on the desk.
b. to destroy; ruin: The bad weather played havoc with our vacation plans.
to work havoc upon; devastate.
to work havoc: The fire havocked throughout the house.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.