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

Residents have been left to buy bottled water, or install costly whole-home filtration systems, in addition to experiencing city water rates that increased 21 percent this year. —Elliot Mann, Twin Cities, 11 Jan. 2026

This can mean using a countertop water filter, installing an under-sink or faucet filter where needed, or even investing in a whole-home water filtration system. —Kristina McGuirk, Better Homes & Gardens, 10 Jan. 2026

Turtles also need constant water filtration to control messes and odor. —Bestreviews, Chicago Tribune, 9 Jan. 2026

For debris handling, Beatbot highlights an ultra-large six-liter debris capacity with fine filtration, and its CES release describes an optional three-micron ultra-fine filter for tighter particle capture. —Ie Creative Studio, Interesting Engineering, 8 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