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

From your vantage point, what factors are most influencing demand for cooling, heating and air filtration today versus earlier decades? —Michaila Byrne, MSNBC Newsweek, 13 Nov. 2025

Contributor Terri Williams praises its 50-minute run-time; tangle-free, five-stage filtration system; and dustbin disposal that deploys at the touch of a button. —Nashia Baker, Architectural Digest, 13 Nov. 2025

With superior suction power, cordless designs, HEPA filtration systems, and ball technology for moveability, Dyson devices are some of the best in the market. —Mariana Best, Better Homes & Gardens, 13 Nov. 2025

Preventive habits include using indoor air filtration and protective eyewear to better protect yourself and your eyes from these inhospitable conditions. —William Jones, Ascend Agency, 11 Nov. 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