filtration

noun

fil·​tra·​tion fil-ˈtrā-shən How to pronounce filtration (audio)
1
: the process of filtering
2
: the process of passing through or as if through a filter
also : diffusion

Examples of filtration 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.
Also, and importantly, the resort just launched an on-site water bottling and filtration system, meaning they can get rid of single-use plastic bottles; this is huge for any property, but especially for one located on an island in the middle of the Pacific. Condé Nast, Condé Nast Traveler, 7 Apr. 2026 Which filtration systems are available in Bissell vacuums? Bestreviews, Chicago Tribune, 7 Apr. 2026 Martinez, who used to work at a water filtration company, said the Inside Safe motel was better than the street. Los Angeles Times, 5 Apr. 2026 The system includes filtration, UV treatment and a water softener, Smith said, and a separate storage container was meant to ensure the landscaping wouldn’t suffer if the well lagged. David Caraccio april 4, Sacbee.com, 4 Apr. 2026 See All Example Sentences for filtration

Word History

Etymology

borrowed from Middle French & Medieval Latin; Middle French, borrowed from Medieval Latin filtrātiōn-, filtrātiō, from filtrāre "to pass through a filter" + Latin -tiōn-, -tiō, suffix of verbal action — more at filtrate

First Known Use

1602, in the meaning defined at sense 1

Time Traveler
The first known use of filtration was in 1602

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Cite this Entry

“Filtration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/filtration. Accessed 8 Apr. 2026.

Kids Definition

filtration

noun
fil·​tra·​tion fil-ˈtrā-shən How to pronounce filtration (audio)
: the act or process of filtering

Medical Definition

filtration

noun
fil·​tra·​tion fil-ˈtrā-shən How to pronounce filtration (audio)
1
: the process of filtering
2
: the process of passing through or as if through a filter
also : diffusion
the kidney produces urine by filtration

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