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.
The whisky was bottled with natural color and no chill filtration at 46 percent ABV. — Jonah Flicker, Robb Report, 16 Oct. 2026 This ongoing cycle of filtration and recycling helps maintain blood magnesium levels. — Md Published, Verywell Health, 14 Oct. 2026 Visit ideas such as reverse osmosis water filtration systems. — Orlando Sentinel Staff, The Orlando Sentinel, 13 Oct. 2026 Some companies sell modest shells that buyers finish themselves; others engineer custom shelters into private estates, with independent power, water, air filtration, medical space and, at the highest end, elaborate amenities. — Megan Buerger, Washington Post, 9 Oct. 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

Rhymes for filtration

See All Rhymes for filtration

Browse Nearby Words

filtrate
filtration
filum aquae
See all Nearby Words

Cite this Entry

“Filtration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/filtration. Accessed 27 Oct. 2026.

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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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