filtration

noun

fil·​tra·​tion fil-ˈtrā-shən 

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

Over the next few years, Connecticut Water is planning 26 projects around the state targeting PFAS filtration to meet the new EPA regulations by the 2029 deadline. —Stephen Underwood, Hartford Courant, 17 Feb. 2026

Contractors said new homeowners increasingly looked for healthier air and water filtration systems after the COVID-19 pandemic. —Francesca Pica, jsonline.com, 17 Feb. 2026

Oklahoma has around 130,000 private water wells, essentially straws that drink from shallow groundwater reserves with minimal filtration, increasing the risk of contamination. —Nick Bowlin, The Frontier, 16 Feb. 2026

In January 2018, Cora, a team contingent, and Boston Mayor Marty Wash flew to Puerto Rico to deliver 10 tons of medical supplies, water filtration systems, other necessities, and a monetary donation. —Gabrielle Starr, Boston Herald, 10 Feb. 2026

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

Rhymes for filtration

• ablation
• bination
• carnation
• cassation
• castration
• causation
• centration
• cessation
• cetacean
• chelation
• citation
• collation

Kids Definition

filtration

noun

fil·​tra·​tion fil-ˈtrā-shən 

: the act or process of filtering

Medical Definition

filtration

noun

fil·​tra·​tion fil-ˈtrā-shən 

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