unrealistic - definition and synonyms

adjective 

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/ˌʌnrɪəˈlɪstɪk/
  1. based on hopes or wishes, and not on what is likely or possible

    Many people in the workplace are set completely unrealistic targets.

    it is unrealistic to do something:

    It is unrealistic to expect children to sit quietly that long.

derived word

unrealistically

 

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/ˌʌnrɪəˈlɪstɪkli/
adverb