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

Remote control operation, likely for maneuvering and parking the trailer via app without the tow vehicle, and multi-stage water filtration will be available optionally. — New Atlas, 23 July 2026

As a producer hunched beneath the tank to show a service technician the filtration system over video call, a cleaning lady entered the room with machinery. — Lauren Oyler, New Yorker, 20 July 2026

Allen has been focused on the idea that buildings can protect humans from the environment from years, and says the changes to ensure better filtration can serve year-round, including during respiratory virus season. — Anjalee Khemlani, Forbes.com, 20 July 2026

Most of the time, though, Crypto is removed gradually as the pool's filtration system continuously circulates and filters the water. — Angela Haupt, Time, 20 July 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
• aeration
• bination
• carnation
• cassation
• castration
• causation
• centration
• cessation
• cetacean
• chelation
• citation

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