Crowd disperser

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ As demonstrations escalated, water cannon and fire engines appeared. ▪ Children and adults were beaten by police and knocked from their feet by powerful water cannon manipulated by their fireman accomplices. ▪ Detachments of ...

Wikipedia Word definitions in Wikipedia
A water cannon is a device that shoots a high-velocity stream of water. Typically, a water cannon can deliver a large volume of water, often over dozens of meters. They are used in firefighting , large vehicle washing and riot control . Most water cannons ...

WordNet Word definitions in WordNet
n. a hose (carried on a truck) that fires water under high pressure to disperse crowds (especially crowds of rioters) [syn: watercannon ]

Wiktionary Word definitions in Wiktionary
n. A device that shoots a large amount water at high pressure through a hose-like tube.