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

Williams tested the 200 and gave its filtration system and tangle-resistant design high remarks, and Keong says the new version maintains these qualities plus more. —Nashia Baker, Architectural Digest, 26 June 2025

Messmer knows that there is PFAS in her tap water—and chose to invest $7,000 in a home filtration system for her entire house. —Ani Freedman, Fortune, 26 June 2025

This situation is especially common for homes on a well system, which is why proper filtration and water treatment are so important. —Timothy Dale, Better Homes & Gardens, 22 June 2025

This forested area is currently dominated by invasive shrub and vine species, which limits the cooling, carbon storage, and water filtration potential of this parcel, as well as the limit for pollinators and wildlife. —Stephen Underwood, Hartford Courant, 17 June 2025

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