Definition of unreasonable adjective from the Oxford Advanced American Dictionary

  

unreasonable

 adjective
adjective
NAmE//ʌnˈrizənəbl//
 
, NAmE//ʌnˈriznəbl//
 
 
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 not fair; expecting too much The job was beginning to make unreasonable demands on his free time. The fees they charge are not unreasonable. It would be unreasonable to expect somebody to come at such short notice. He was being totally unreasonable about it. opposite reasonable
unreasonableness
 
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noun [uncountable]
unreasonably
 
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NAmE//ʌnˈrizənəbli//
 
, NAmE//ʌnˈriznəbli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: unreasonable