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

Visit ideas such as reverse osmosis water filtration systems. — Orlando Sentinel Staff, The Orlando Sentinel, 13 Oct. 2026

Some companies sell modest shells that buyers finish themselves; others engineer custom shelters into private estates, with independent power, water, air filtration, medical space and, at the highest end, elaborate amenities. — Megan Buerger, Washington Post, 9 Oct. 2026

The facility was not using the proper filtration system in the other building. — Ruben Vives, Los Angeles Times, 8 Oct. 2026

There is a water filtration system in place on property, so there is no need for plastic water bottles—in fact, guests are given large reusable water bottles to use throughout their stay. — Condé Nast, Condé Nast Traveler, 7 Oct. 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