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filter - definition and synonyms


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verb filter pronunciation in American English /ˈfɪltər/
Word Forms
present tense
present participlefiltering
past tensefiltered
past participlefiltered
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  1. 1
    [transitive] to pass something through a filter to remove particular things contained in it
  2. 2
    [intransitive] if light or sound filters into a place, only a little of it enters that place
    filter through/in/into, etc.:

    The August sunlight filtered in through the blinds.

    The noise of the traffic filtered through the heavy curtains.

  3. 3
    [intransitive] if news or information filters out or through to people, they receive it gradually or after a period of time
    filter through/out/back, etc.:

    News of the decision filtered out to reporters.

    These new ideas have not yet filtered down to the salespeople.

  4. 4
    [intransitive] if people filter somewhere, they gradually go there
    filter in/into/out etc.:

    At 7:00 people began to filter into the theater.

  5. 5
    [intransitive] British if traffic filters somewhere, it turns right or left when a separate traffic light gives it the signal to go

phrasal verbs

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the activity of exploring abandoned buildings and other manmade structures

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