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.
That’s why many families are starting to look for filtration systems that go beyond taste and target something deeper: trust. Jon Stojan, USA Today, 3 July 2025 In addition to trees' filtration of air pollutants, local parks also help mitigate many millions of gallons of stormwater, a pertinent benefit in the wake of this month's widespread and historic flooding. Connor Giffin, The Courier-Journal, 3 July 2025 Replace your shower head's filter screen once per year for optimal filtration (which will help decrease buildup residue). Hallie Milstein, Southern Living, 2 July 2025 South Elgin’s website has information on how to mitigate possible contamination by using filtration products and systems, Pierce said. Gloria Casas, Chicago Tribune, 1 July 2025 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

Browse Nearby Words

Cite this Entry

“Filtration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/filtration. Accessed 18 Jul. 2025.

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

More from Merriam-Webster on filtration

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