chemical weapon

noun

: a weapon (such as mustard gas or sarin) used in chemical warfare

Examples of chemical weapon 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.
There are also concerns that troops could encounter fentanyl as a chemical weapon. Stephanie Pappas, Scientific American, 30 Dec. 2025 The executive order casts fentanyl as not just a lethal drug, but as a potential chemical weapon. Kathryn Watson, CBS News, 15 Dec. 2025 President Donald Trump signed a historic executive order declaring illicit fentanyl and its precursor chemicals Weapons of Mass Destruction (WMD), warning that the drug poses a threat more comparable to a chemical weapon than a narcotic. Stepheny Price, FOXNews.com, 15 Dec. 2025 The statement echoes a claim repeated by Trump administration officials that street drugs might at some point be used as a chemical weapon, or a weapon of mass destruction, potentially killing large numbers of U.S. citizens. Brian Mann, NPR, 11 Dec. 2025 See All Example Sentences for chemical weapon

Word History

First Known Use

1920, in the meaning defined above

Time Traveler
The first known use of chemical weapon was in 1920

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Cite this Entry

“Chemical weapon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chemical%20weapon. Accessed 15 Jan. 2026.

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