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valid - definition and synonyms


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adjective valid pronunciation in British English /ˈvælɪd/
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  1. 1
    a valid document or ticket will be accepted by officials
    You will need a valid passport.
    valid for: This offer is valid for travel before the end of April.
    1. a.
      legally accepted
      A 50% turnout was required for the vote to be valid.
      a valid claim
  2. 2
    reasonable and generally accepted
    If the underlying assumption isn’t valid, then the prosecution’s case simply falls apart.
    a valid reason/excuse: These are valid reasons why we should ban tobacco advertising.
    a valid point/argument/criticism: Some of the criticisms were perfectly valid.

derived word


 valid pronunciation in British English /vəˈlɪdəti/ noun [uncountable]
the validity of the claim


a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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a stupid person

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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