warrant - definition and synonyms

verb [transitive] 

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present tense
present participlewarranting
past tensewarranted
past participlewarranted
  1. 1
    to make an action seem reasonable or necessary

    What he did was serious enough to warrant punishment.

    I don’t think a visit to the doctor is warranted.

  2. 2
    formal to promise something
    warrant that:

    The company must warrant that the goods meet high standards of construction.