—n. 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.
—v.t. to work havoc upon; devastate.
—v.i. to work havoc: The fire havocked throughout the house.