Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “filter”

See all translations

filter

noun [C] uk   /ˈfɪl.tər/ us    /-t̬ɚ/

filter noun [C] (EQUIPMENT)

C2 any of several types of equipment or devices for removing solids from liquids or gases, or for removing particular types of light: a water filter a dust filter I like to experiment with different light filters on my camera. Ozone is the Earth's primary filter for ultraviolet radiation.

filter noun [C] (TRAFFIC)

UK a green, arrow-shaped light that is part of a set of traffic lights and tells drivers when they can turn left or right: a traffic filter a left/right filter

filter

verb uk   /ˈfɪl.tər/ us    /-t̬ɚ/

filter verb (APPEAR GRADUALLY)

C2 [I + adv/prep] to appear or happen gradually or to a limited degree: News filtered down to us during the day. Reports about an accident began to filter in. Sunlight filtered through the branches.

filter verb (REMOVE)

C2 [T] to remove solids from liquids or gases, or to remove particular types of light, using special equipment: The water is filtered to remove any impurities. Devices in the two chimneys would filter (out) (= remove) radioactive dust.
Phrasal verbs
Translations of “filter”
in Korean 필터, 여과 장치…
in Arabic مِصْفاة…
in French filtre…
in Turkish süzmek, süzgeçten geçirmek, elemek…
in Italian filtro…
in Chinese (Traditional) 除去物件的裝置, 濾器, 過濾器…
in Russian фильтровать, процеживать…
in Polish filtrować…
in Spanish filtro…
in Portuguese filtro…
in German der Filter, Filter-……
in Catalan filtre…
in Japanese フィルター…
in Chinese (Simplified) 除去物件的设置, 滤器, 过滤器…
(Definition of filter from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of filter?
Add Cambridge dictionaries to your browser to your website

Definitions of “filter” in other dictionaries

Word of the Day

white Christmas

a Christmas when it snows

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More