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 smart tool is also equipped with a HEPA (or high-efficiency particulate air) filtration system, which captures microscopic particles and allergens while expelling cleaner air. —Jenny Berg, Vogue, 2 Dec. 2024

For example, Flo Water has a water filtration system that prevents the use of plastic bottles. —John Hall, Forbes, 1 Dec. 2024

Bouse residents who don’t get water from the district use their own wells, which do not benefit from the district’s filtration system, and often go to local RV parks or water distribution stations for their drinking water. —Austin Corona, The Arizona Republic, 25 Nov. 2024

The new model gets rid of the plastic housing most filters have on their refills, cutting plastic waste by 80 to 90% while maintaining the brand’s high standard of filtration. —Emma Barker Bonomo, TIME, 30 Oct. 2024

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

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