contamination

noun

con·​tam·​i·​na·​tion kən-ˌta-mə-ˈnā-shən How to pronounce contamination (audio)
Synonyms of contaminationnext
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.
Armed with flashlights and ultraviolet lamps, members of the Nancy Grace Roman Space Telescope team carefully examined the observatory's primary mirror, searching for even the smallest trace of contamination. Kenna Hughes-Castleberry, Space.com, 25 Dec. 2025 The contamination was first brought to the FSIS's attention after Olympia Provisions received a consumer complaint. Katie Hill, PEOPLE, 22 Dec. 2025 Avoid Cross-Contamination Cross-contamination is a critical concern when doing laundry. Jolie Kerr, Better Homes & Gardens, 22 Dec. 2025 Marinaccio said proper handwashing and better glove training are essential, as poor hygiene is one of the most common sources of contamination. Deirdre Bardolf, FOXNews.com, 21 Dec. 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 31 Dec. 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

Last Updated: - Updated example sentences
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