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

In response, cities expanded sewer networks and installed municipal water filtration systems, treating sanitation as a public responsibility rather than a private household matter. —Time, 19 Dec. 2025

It was bottled without chill filtration at 48 percent ABV. —Jonah Flicker, Robb Report, 18 Dec. 2025

Post-renovation, every room and suite is equipped with a wet bar with a water filtration system so guests can refill their water bottles (provided by the hotel). —Dobrina Zhekova, Travel + Leisure, 5 Dec. 2025

Anaheim is spending $200 million to outfit several of its groundwater wells with ion exchange filtration – a technique that uses resin beads to snare and remove particles from water, according to the city website. —Austin Fast, USA Today, 5 Dec. 2025

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