American English

Definition of seriously adverb from the Oxford Advanced American Dictionary

      

    seriously

     adverb
    adverb
    NAmE//ˈsɪriəsli//
     
     
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  1. 1in a serious way to be seriously ill/injured You're not seriously expecting me to believe that? They are seriously concerned about security. Smoking can seriously damage your health.
  2. 2 used to show a change from joking to being more serious or to check that someone really means what they have said Seriously though, it could be really dangerous. Seriously? You didn't know that I had called?
  3. 3(informal) very; extremely They're seriously rich.
  4. Idioms
    take somebody/something seriously
     
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    to think that someone or something is important and deserves your attention and respect We take threats of this kind very seriously. Why can't you ever take anything seriously? Headaches in young children should always be taken seriously. You can't take anything she says very seriously.
See the Oxford Advanced Learner's Dictionary entry: seriously