contamination

noun

con·​tam·​i·​na·​tion kən-ˌta-mə-ˈnā-shən How to pronounce contamination (audio)
1
: a process of contaminating : a state of being contaminated
2

Examples of contamination in a Sentence

swimming in the lake is banned until the contamination is identified and neutralized
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.
Damaged packaging can increase contamination risk, and even foods that appear safe may pose health hazards. Jasmine Laws, MSNBC Newsweek, 25 July 2025 Thus, the finding of arsenic with the genetic material could have simply been contamination. Beth Mole, ArsTechnica, 25 July 2025 The bill aims to address contamination from lead, arsenic, PFAS, nitrates, and other compounds found in private wells. Laura Schulte, jsonline.com, 24 July 2025 The renovation costs will exceed $2 billion, in part due to asbestos and lead contamination discovered during the initial stages. Adam Jeffery,christina Wilkie, CNBC, 24 July 2025 See All Example Sentences for contamination

Word History

Etymology

Middle English contaminacioun, borrowed from Latin contāminātiōn-, contāminātiō "defilement, pollution," from contāmināre "to defile, pollute" + -tiōn-, -tiō, suffix of verbal action — more at contaminate

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of contamination was in the 15th century

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Cite this Entry

“Contamination.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/contamination. Accessed 29 Jul. 2025.

Medical Definition

contamination

noun
con·​tam·​i·​na·​tion kən-ˌtam-ə-ˈnā-shən How to pronounce contamination (audio)
1
: a process of contaminating : a state of being contaminated
2
: something that contaminates

More from Merriam-Webster on contamination

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