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knock  - definition and synonyms

 
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noun [countable] knock pronunciation in British English /nɒk/
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singularknock
pluralknocks
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  1. 1
    the sound of someone knocking on a door
    knock on/at:

    There was a loud knock at the door.

  2. 2
    an injury or damage caused by being knocked

    a nasty knock on the head

    1. a.
      an instance of knocking someone or something

      The watch is built to withstand the occasional knock.

  3. 3
    something bad or unpleasant that happens to someone
    hard knocks:

    Life is full of hard knocks.

bit rot

when electronic information is lost because the software or devices needed to read it are no longer available

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