poison gas

noun

: a poisonous gas or a liquid or a solid giving off poisonous vapors designed (as in chemical warfare) to kill, injure, or disable by inhalation or contact

Examples of poison gas in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the late 1920s, the Japanese Imperial Army began using the island as a testing site for chemical weapons, most notably poison gas. Madeline Weinfield, Travel + Leisure, 9 Feb. 2026 Blood of My Blood doesn’t shy away from the violence and gore of this war — there is blood and guts and young men dying, there is poison gas and bodies on barbed wire. Maggie Fremont, Vulture, 9 Aug. 2025 In August 2013, the Syrian regime used poison gas to kill more than 1,400 innocent civilians, including hundreds of children. H. R. McMaster, Foreign Affairs, 1 June 2020 See All Example Sentences for poison gas

Word History

First Known Use

1816, in the meaning defined above

Time Traveler
The first known use of poison gas was in 1816

Browse Nearby Words

Cite this Entry

“Poison gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/poison%20gas. Accessed 3 Jul. 2026.

Kids Definition

poison gas

noun
: a poisonous gas or a liquid or a solid giving off poisonous vapors designed (as in chemical warfare) to kill or injure

Medical Definition

poison gas

noun
: a poisonous gas or a liquid or a solid giving off poisonous vapors designed (as in chemical warfare) to kill, injure, or disable by inhalation or contact

More from Merriam-Webster on poison gas

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster