purport - definition and synonyms

verb [intransitive] formal 

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present tense
present participlepurporting
past tensepurported
past participlepurported
  1. to claim or seem to be something or to do something, especially when this is not possible or true
    purport to do something:

    This book purports to contain all the information you require.

    be purported to do something:

    Some food supplements are purported to enhance memory.