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.
Ready-to-eat food subject to contamination by raw animal product (raw chicken and beef kabobs above ready to eat food in reach in cooler, raw chicken and fish above ready to eat food in walk-in cooler). Gege Reed, Louisville Courier Journal, 24 Oct. 2025 Side effects may include stomach issues, headaches, and rare kidney problems from contamination. Sarah Anzlovar, Verywell Health, 23 Oct. 2025 Among the meat sampled, contamination rates were highest in chicken and turkey products. Aria Bendix, NBC news, 23 Oct. 2025 In a new Consumer Reports (CR) investigation, a team of researchers tested 23 protein powders and ready-to-drink shakes from popular brands, finding that heavy metal contamination is more common than traditionally thought, flagging new concerns about how healthy these health products actually are. New Atlas, 22 Oct. 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 Oct. 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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