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 January 2018, Cora, a team contingent, and Boston Mayor Marty Wash flew to Puerto Rico to deliver 10 tons of medical supplies, water filtration systems, other necessities, and a monetary donation. —Gabrielle Starr, Boston Herald, 10 Feb. 2026

The requirement is lower in Europe, these masks only have to reach an 80% filtration standard. —Bestreviews, Chicago Tribune, 10 Feb. 2026

The Luxe Package also comes standard, bringing along comforts like heated floors, water filtration, continuous hot water and a HEPA air filter. —New Atlas, 6 Feb. 2026

Look for top-tier filtration systems. —Nashia Baker, Architectural Digest, 27 Jan. 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
• 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