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  • tear gas
    tear gas
    noun
    a gas that makes the eyes smart and water, thus producing a temporary blindness, used in modern warfare, to quell riots, etc.
  • tear-gas
    tear-gas
    verb (used with object)
    to subject to tear gas.
Synonyms

tear gas

1 American  
[teer] / tɪər /

noun

  1. a gas that makes the eyes smart and water, thus producing a temporary blindness, used in modern warfare, to quell riots, etc.


tear-gas 2 American  
[teer-gas] / ˈtɪərˌgæs /

verb (used with object)

tear-gassed, tear-gassing
  1. to subject to tear gas.


tear gas British  
/ tɪə /

noun

  1. Also called: lacrimator.  any one of a number of gases or vapours that make the eyes smart and water, causing temporary blindness; usually dispersed from grenades and used in warfare and to control 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 tear gas1

First recorded in 1915–20

Origin of tear-gas2

First recorded in 1945–50

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.

See Examples For:

"The smell there is worse than the tear gas," Ishan said, laughing.

From BBC Jul. 22, 2026

Police in Kenya have fired tear gas to break up a protest in the central town of Nanyuki against the construction of an Ebola quarantine centre for US citizens.

From BBC Jun. 9, 2026

After a day of largely peaceful demonstrations on Saturday, including a counter-protest in support of ICE, some protesters attempted to breach a police barricade, prompting police to use tear gas.

From Barron's May 31, 2026

Whether the substance was tear gas — which, incidentally, is a powder, not a gas — or pepper spray is unclear.

From Los Angeles Times May 22, 2026

He should ask Harrison about tear gas now, but instead he said, “Let me show you my new room in the Boys’ Quarters.”

From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie

“It’s a different thing to ask, ‘Will you show up to this protest, where police might come and tear-gas us?’ versus ‘We’re getting whistles. Do you think you could help us with some extra baggies?’

From Slate Jan. 31, 2026

In the confrontation that followed, one of the agents tossed a tear-gas canister, which an employee kicked under their vehicle, enveloping it with noxious fumes.

From The Wall Street Journal Jan. 20, 2026

This prompted police to fire tear-gas cannisters to try and stop the procession, which affected traffic.

From BBC Aug. 1, 2024

At the Capitol, he said a tear-gas canister exploded near him, causing him to don his respirator, and soon, “I became part of the problem. I became part of the mob.”

From Washington Post Mar. 21, 2023

The gun rack, set between two of the eight windows, held a Remington shotgun, a Colt AR-15 assault rifle, a tear-gas gun, and many rounds of ammunition.

From "Newjack: Guarding Sing Sing" by Ted Conover

I have never dropped bombs or tear-gassed anyone.

From Salon Feb. 13, 2026

During the 2019 pro-democracy protests in Hong Kong, Mr Lai would join the tear-gassed crowds and listen to protesters before returning to the newsroom to direct coverage.

From BBC Dec. 18, 2023

Mayor Ted Wheeler sided with protesters, at one point standing alongside black-clad demonstrators as they were tear-gassed.

From Los Angeles Times Feb. 10, 2023

“Just got tear-gassed, but we’re good, baby, we’re good! We’re pushing forward now!”

From Seattle Times Nov. 9, 2021

Thackeray reminisced at length about being tear-gassed blind in the November 1969 antiwar protests in Washington Circle, covering them for her college paper.

From The Hacker Crackdown, law and disorder on the electronic frontier by Sterling, Bruce

“I actually think we could be promoting COVID-19 by tear-gassing protesters,” said Balmes.

From Scientific American Jun. 8, 2020

She oversaw punitive operations along the southern border that included the tear-gassing of hundreds of desperate would-be refugees near the San Ysidro border crossing.

From Slate Apr. 9, 2019

State Sen. Maria Chappelle-Nadal, who represents Ferguson and live-tweeted her tear-gassing by police, is one of 10 Democrats outnumbered by 24 Republicans.

From Slate Aug. 15, 2014

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