not professional; not pertaining to or characteristic of a profession.
at variance with or contrary to professional standards or ethics; not befitting members of a profession, as language, behavior, or conduct.
not belonging to a profession; nonprofessional.
not done with professional competence, as a play staged or an opera performed by amateurs; amateurish.


a person who is not a professional; amateur.

Origin of unprofessional

First recorded in 1800–10; un-1 + professional
Related formsun·pro·fes·sion·al·ism, nounun·pro·fes·sion·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Contemporary Examples of unprofessional

Historical Examples of unprofessional

British Dictionary definitions for unprofessional



contrary to the accepted code of conduct of a profession
not belonging to or having the required qualifications for a profession
Derived Formsunprofessionally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unprofessional

1806, from un- (1) "not" + professional.

Online Etymology Dictionary, © 2010 Douglas Harper