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

Astronauts bring them on journeys to keep an eye on whether or not the water filtration systems are working, much the way miners used to take canaries down to the coal mines to check for poisonous gas leaks. — Leslie Felperin, HollywoodReporter, 18 Sep. 2026

Among the items are discarded personal protective equipment, thermal insulation, electrical cabling, structural steel, rebar, loose soil, building concrete, and exhausted ion-exchange resins taken from water filtration networks. — Aman Tripathi, Interesting Engineering, 18 Sep. 2026

Many hiking trails and lodging areas remain closed, and water has been shut off in the inner canyon, prompting advisories that hikers bring their own water or water filtration devices. — ABC News, 17 Sep. 2026

Soil provides additional filtration as the water passes through. — Ryan Brennan, Fort Worth Star-Telegram, 17 Sep. 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