adjective
- 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.
- Sports. nonprofessional(def 2).
noun
- a person who is not a professional; amateur.
adjective
- contrary to the accepted code of conduct of a profession
- amateur
- not belonging to or having the required qualifications for a profession
adj.1806, from un- (1) “not” + professional.