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.
Rigdon says his team has installed advanced air filtration systems capable of blocking radioactive particles, ensuring residents can safely shelter amid fallout. Abby Montanez, Robb Report, 29 July 2025 Flooding often disrupts water treatment capabilities by overwhelming filtration systems, contaminating supplies with debris or runoff, and damaging essential infrastructure such as intake pumps or electrical systems. Hollie Silverman, MSNBC Newsweek, 29 July 2025 The filtration systems built into county wells work in a manner similar to what is used (and recommended) for home tap water; as devices that simply trap and collect PFAS chemicals. Andre Mouchard, Oc Register, 20 July 2025 The three-in-one filtration system of the Levoit Core 300S helps your student combat the morning dry throat and nighttime congestion that can come with dorm room living. Cheryl Fenton, Parents, 19 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 12 Aug. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!