American English

Definition of unacceptable adjective from the Oxford Advanced American Dictionary

  

unacceptable

 adjective
adjective
NAmE//ˌʌnəkˈsɛptəbl//
 
 
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 that you cannot accept, allow, or approve of Such behavior is totally unacceptable in a civilized society. Noise from the factory has reached an unacceptable level. opposite acceptable
unacceptably
 
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NAmE//ˌʌnəkˈsɛptəbli//
 
adverb unacceptably high levels of unemployment
See the Oxford Advanced Learner's Dictionary entry: unacceptable