Meaning

noun a public act of violence by an unruly mob

verb take part in a riot; disturb the public peace by engaging in a riot

noun a state of disorder involving group violence

originFrom Middle English riot (“debauched living, dissipation”), from Old French riote (“debate”), from rioter (“to quarrel”), perhaps related to riboter or from Latin rugio (“to roar”). Compare French riotte and Occitan riòta.

Etymology from Wiktionary, CC BY-SA 3.0