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noun [countable] invalid pronunciation in British English /ˈɪnvəlɪd/
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singularinvalid
pluralinvalids
  1. someone who is ill or injured and is unable to look after themselves

    He had been an invalid for many years.

    1. a.
      [only before noun] relating to someone who is ill or injured, especially permanently

      He lives with his invalid mother.

bit rot

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

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troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

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