Definition of unprofessional adjective from the Oxford Advanced American Dictionary

 

unprofessional

 adjective
adjective
NAmE//ˌʌnprəˈfɛʃənl//
 
 
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not reaching the standard expected in a particular profession She was found guilty of unprofessional conduct. opposite professional compare nonprofessional
unprofessionally
 
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NAmE//ˌʌnprəˈfɛʃənəli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: unprofessional