fil·​tra·​tion | \ fil-ˈtrā-shən How to pronounce filtration (audio) \

Definition of filtration

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 At Prince George’s Church of Christ in Landover, minister Bruce McClure bought a new air filtration system and is requiring everyone inside to wear a mask. Washington Post, "Prince George’s lifts more restrictions as region’s falling virus caseload begins to flatten," 29 June 2020 Proceeds will support access to clean water at the sisters’ missions in Guatemala, Peru, India and Tanzania, including building new wells, safe water storage facilities, and filtration systems. Kathy Flanigan, Milwaukee Journal Sentinel, "Nuns plan Beer Garden in a Box (with Ale Mary and Glory Be amber) to raise money for charity," 29 June 2020 The Dream City Church in Phoenix, where President Donald Trump is scheduled to attend a rally Tuesday, made a surprising claim Sunday: its building has an air filtration system that could neutralize the coronavirus. NBC News, "Can air filtration stop coronavirus at a Trump rally in Phoenix? Experts doubt it.," 23 June 2020 Even given this filtration, a city the size of Toronto could still be emitting hundreds of billions of microfibers each year, according to one study from 2018 by researchers at the University of Toronto. Matt Simon, Wired, "Who's to Blame for Plastic Microfiber Pollution?," 22 June 2020 Both Aithinne and Nonnenmann say public washrooms should be cleaned more regularly and thoroughly during the COVID-19 pandemic and extra ventilation or filtration should be installed if possible. Popular Science, "You probably won’t get COVID-19 from flushing the toilet," 18 June 2020 Air filtration systems have been a popular improvement for years as homes are being built tighter for efficiency, says Freres. oregonlive, "5 ways home design was forever changed by the coronavirus: Need for a hygiene station, surplus food storage, dedicated home office," 19 June 2020 The line also announced a new air filtration system and the inclusion of testing kits and more medical supplies on board, including more medications to treat symptoms of COVID-19. Morgan Hines, USA TODAY, "Norwegian, Oceania, Regent cruise lines extend suspensions into fall," 18 June 2020 The machine also uses HEPA filtration to capture allergens and expel cleaner air, which has been especially helpful now that allergy season is in full swing. Rebecca Shinners,, "This Dyson Cordless Vacuum Is the Father’s Day Gift That the Entire Family Will Love," 17 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'filtration.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of filtration

1602, in the meaning defined at sense 1

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Time Traveler for filtration

Time Traveler

The first known use of filtration was in 1602

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Statistics for filtration

Last Updated

5 Jul 2020

Cite this Entry

“Filtration.” Dictionary, Merriam-Webster, Accessed 8 Jul. 2020.

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How to pronounce filtration (audio)

English Language Learners Definition of filtration

technical : the act or process of removing something unwanted from a liquid, gas, etc., by using a filter


fil·​tra·​tion | \ fil-ˈtrā-shən How to pronounce filtration (audio) \

Kids Definition of filtration

: the process of filtering


fil·​tra·​tion | \ fil-ˈtrā-shən How to pronounce filtration (audio) \

Medical Definition of filtration

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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More from Merriam-Webster on filtration

Rhyming Dictionary: Words that rhyme with filtration

Spanish Central: Translation of filtration

Nglish: Translation of filtration for Spanish Speakers

Britannica English: Translation of filtration for Arabic Speakers

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