On some days there have been more police water-cannon trucks and riot shields on show than tanks.
The mob flipped over a news van, tore down two lampposts, and threw rocks and cans; police responded with riot gear and tear gas.
Brutal crackdowns, riot police, and blocked websites didn't stop thousands of Iranians from flooding the streets Monday.
They made one last charge for the airport, and when the riot police blocked them again a melee ensued.
riot police clashed with the marchers as they tried to enter Abbas's headquarters.
riot and disorder too often characterized the events of that season.
He was then free to execute his purpose, but he must not make a riot.
I had cast off all feeling, subdued all anguish to riot in the excess of my despair.
Because there was so much to say there was nothing to say in that riot of the sea and of their emotions.
Then ensued a scene of riot and carnage such as no human pen, or steel one either, could describe.
c.1200, "debauchery, extravagance, wanton living," from Old French riote (12c.) "dispute, quarrel, (tedious) talk, chattering, argument, domestic strife," also a euphemism for "sexual intercourse," of uncertain origin. Cf. Medieval Latin riota "quarrel, dispute, uproar, riot." Perhaps from Latin rugire "to roar." Meaning "public disturbance" is first recorded late 14c. Meaning "something spectacularly successful" first recorded 1909 in theater slang.
Run riot is first recorded 1520s, a metaphoric extension from Middle English meaning in reference to hounds following the wrong scent. The Riot Act, part of which must be read to a mob before active measures can be taken, was passed 1714 (1 Geo. I, st.2, c.5). Riot girl and alternative form riot grrl first recorded 1992.