filter Meaning in the Cambridge English Dictionary
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Meaning of “filter” in the English Dictionary

"filter" in British English

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filternoun [C]

uk   /ˈfɪl.tər/  us   /-t̬ɚ/

filter noun [C] (EQUIPMENT)

C2 any of several ​types of ​equipment or ​devices for ​removingsolids from ​liquids or ​gases, or for ​removingparticulartypes 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 ​ultravioletradiation.

filter noun [C] (TRAFFIC)

UK a ​green, arrow-shaped ​light that is ​part of a set of trafficlights and ​tellsdrivers when they can ​turnleft or ​right: a ​traffic filter a ​left/​right filter

filterverb

uk   /ˈfɪl.tər/  us   /-t̬ɚ/

filter verb (APPEAR GRADUALLY)

C2 [I + adv/prep] to ​appear or ​happengradually or to a ​limiteddegree: News filtered down to us during the ​day. Reports about an ​accidentbegan to filter in. Sunlight filtered through the ​branches.

filter verb (REMOVE)

C2 [T] to ​removesolids from ​liquids or ​gases, or to ​removeparticulartypes of ​light, using ​specialequipment: The ​water is filtered to ​remove any ​impurities. Devices in the two ​chimneys would filter (out) (= ​remove)radioactivedust.
Phrasal verbs
(Definition of filter from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"filter" in American English

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filternoun [C]

 us   /ˈfɪl·tər/
a ​piece of ​equipment or a ​device for ​removingsolids from ​liquids or ​gases, or for limiting the ​particulartype of ​light, ​sound, or ​electricity going through it: an ​oil filter a ​coffee filter

filterverb [I/T]

 us   /ˈfɪl·tər/
If something filters down, in, out, or through, it ​appears or ​happensgradually or to a ​limiteddegree: [I always + adv/prep] Reports of the ​accidentbegan to filter in. [I always + adv/prep] Sunlight filtered through the ​branches.
(Definition of filter from the Cambridge Academic Content Dictionary © Cambridge University Press)

"filter" in Business English

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filternoun [C]

uk   us   /ˈfɪltər/ IT
a ​computerprogram that receives and ​processesinformation before ​displaying it or preventing it from being seen: Junk email filtershelpdefine which ​emailmessages are ​spam. This web filterenablesadministrators to ​monitoruserbehaviour.

filterverb [T]

uk   us   /ˈfɪltər/ IT
to use a ​computerprogram to ​processinformation before ​displaying it or preventing it from being seen: The ​company, whose ​products filter ​email and ​internetcontent, ​confirmed a ​record second ​quarter yesterday.
filtering
noun [U]
Email filtering is the ​removal of ​unwantedemail, for ​examplespam or a ​phishing attempt, before it ​reaches your ​mailbox.
(Definition of filter from the Cambridge Business English Dictionary © Cambridge University Press)
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