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 cabin also features Pur air circulation, an advanced HEPA air filtration system, and circadian rhythm lighting to minimize jet lag. —Rachel Cormack, Robb Report, 8 June 2026

Designing for the Outbreak Zone Lower-tech versions of blood-filtration systems are in development, and some medical device makers have begun sketching out designs that could, in principle, operate without any hospital infrastructure—some even without electricity. —Elie Dolgin, IEEE Spectrum, 4 June 2026

At-home kits are available online, and some companies will test for free in the hopes of selling you a filtration system. —Angela Haupt, Time, 3 June 2026

Once past filtration, the sewage water is sent to be disinfected using chlorine. —Emma Hall, Sacbee.com, 3 June 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