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 AquaTru Classic is a highly effective countertop reverse osmosis system with a four-stage filtration process that removes up to 99 percent of more than 80 contaminants, including lead, fluoride and PFAS. —Nora Colomer, FOXNews.com, 6 Sep. 2025

In the late 1890s, Louisville Water Company invited four companies to Louisville to create a filtration system. —Maggie Menderski, Louisville Courier Journal, 4 Sep. 2025

Households served by public water systems with high levels of PFAS may want to use drinking water filtration systems. —Jiameng Zheng, The Conversation, 4 Sep. 2025

The 12-stage filtration system is actually the most impressive part. —Yelena Moroz Alpert, Architectural Digest, 3 Sep. 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