Dictionary.com
Thesaurus.com

water cannon

American  

noun

  1. a truck-mounted hose or pipe that shoots a jet of water through a nozzle at extremely high pressure, used especially in dispersing rioters or demonstrators.


water cannon British  

noun

  1. an apparatus for pumping water through a nozzle at high pressure, used in quelling riots

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of water cannon

First recorded in 1965–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Taiwanese boats also have water cannon and a 20-millimetre static machine gun, but are careful to avoid a confrontation that "could lead to unimaginable consequences", Huang said.

From Barron's • Nov. 11, 2025

One woman brandished a Georgian flag as she braved a stream of water cannon, while another walked headlong into a barricade of police standing behind riot shields.

From BBC • Dec. 4, 2024

Ranks of police with shields and water cannon were stationed at the building to prevent demonstrators from stopping legislators getting into the parliament building to enact the new law.

From BBC • May 13, 2024

The scream was just right — bloodcurdling, if also very funny — and the practical effects crew had finally found the proper volume and trajectory of the water cannon.

From New York Times • Apr. 9, 2024

He wore a black ski mask and carried a large, complex green water cannon.

From "Paper Towns" by John Green

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "water cannon" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com