¦ noun
1. widespread destruction.
2. great confusion or disorder.
¦ verb (havocs, havocking, havocked) archaic lay waste to.
Phrases
play havoc with completely disrupt.
Origin
ME: from Anglo-Norman Fr. havok, alt. of OFr. havot, of unknown origin; the word was orig. used in the phr. cry havoc 'give an army the order havoc', which was the signal for plundering.