- great destruction or devastation; ruinous damage.
- to work havoc upon; devastate.
- to work havoc: The fire havocked throughout the house.
- cry havoc, to warn of danger or disaster.
- 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.
—Related formshav·ock·er, noun



