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

The apartment has also been updated with new windows, modern HVAC with humidification, upgraded insulation, and integrated water filtration systems. —Abby Montanez, Robb Report, 10 Apr. 2026

Also, and importantly, the resort just launched an on-site water bottling and filtration system, meaning they can get rid of single-use plastic bottles; this is huge for any property, but especially for one located on an island in the middle of the Pacific. —Condé Nast, Condé Nast Traveler, 7 Apr. 2026

Which filtration systems are available in Bissell vacuums? —Bestreviews, Chicago Tribune, 7 Apr. 2026

Martinez, who used to work at a water filtration company, said the Inside Safe motel was better than the street. —Los Angeles Times, 5 Apr. 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