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

Providing a filtration system to a village is a good start, but true impact happens when businesses, governments and local leaders come together to invest in infrastructure, shape policy and empower people to be part of the solution. —Firaaz Azeez, Forbes.com, 15 May 2025

The top half contains the bladeless amplifier loop fan that distributes clean air to the room, while the bottom half pulls air into the filtration system. —PC Magazine, 15 May 2025

In April 2024, the EPA under the Biden Administration set limits on certain PFAS chemicals in drinking water, requiring community water systems to find alternative water sources or install filtration systems to remove them. —Pien Huang, NPR, 14 May 2025

As for the cooling setting, this is a great option because the Dyson appliance only circulates purified air using HEPA filtration throughout your whole room. —Nashia Baker, Architectural Digest, 29 Apr. 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