Definition of warrant verb from the Oxford Advanced American Dictionary

     

    warrant

     verb
    verb
    NAmE//ˈwɔrənt//
     
    , NAmE//ˈwɑrənt//
     
    (formal)Verb Forms present simple I / you / we / they warrant
     
    ,
     
    he / she / it warrants
     
    ,
     
    past simple warranted
     
    ,
     
    -ing form warranting
     
    ,
     
     
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  1. 1to make something necessary or appropriate in a particular situation synonym justify
  2. 2 warrant something Further investigation is clearly warranted. warrant (somebody/something) doing something The situation scarcely warrants their/them being dismissed. see also unwarranted
  3. Idioms
    I/I'll warrant (you)(old-fashioned)
     
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    used to tell someone that you are sure of something and that they can be sure of it too
See the Oxford Advanced Learner's Dictionary entry: warrant