Definition of whatever determiner from the Oxford Advanced Learner's Dictionary

      

    whatever

     determiner,pronoun
    determiner, pronoun
    BrE BrE//wɒtˈevə(r)//
     
    ; NAmE NAmE//wətˈevər//
     
    , NAmE//wɑːtˈevər//
     
     
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  1. 1  any or every; anything or everything Take whatever action is needed. Do whatever you like.
  2. 2  used when you are saying that it does not matter what somebody does or what happens, because the result will be the same Whatever decision he made I would support it. You have our support, whatever you decide.
  3. 3(especially British English) used in questions to express surprise or confusion Whatever do you mean? Chocolate-flavoured carrots!Whatever next?
  4. 4(informal, ironic) used as a reply to tell somebody that you do not care what happens or that you are not interested in what they are talking about ‘You should try a herbal remedy.’ ‘Yeah, whatever.’
  5. 5(informal) used to say that you do not mind what you do, have, etc. and that anything is acceptable ‘What would you like to do today?’ ‘Whatever.’
  6. Idioms (informal) or something of a similar type It's the same in any situation: in a prison, hospital or whatever. used to warn somebody not to do something under any circumstances Don't tell Paul, whatever you do!
See the Oxford Advanced American Dictionary entry: whatever