A violent disturbance of the peace or display of brutality by a group of police officers, especially one initially directed at civilians engaged in a protest or demonstration.
Origin
Early 19th century; earliest use found in The Times.
Definition of police riot in US English:
police riot
noun
A violent disturbance of the peace or display of brutality by a group of police officers, especially one initially directed at civilians engaged in a protest or demonstration.
Origin
Early 19th century; earliest use found in The Times.