Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “unprofessional”


adjective     /ˌʌnprəˈfeʃənəl/
not showing the standard of behaviour or work that is expected of a person doing their job : unprofessional behaviour/conduct Two employees have been suspended after allegations of unprofessional behaviour . The tribunal upheld her complaint that he had treated her in an unprofessional manner . → Compare non-professional, professional adjective
(Definition of unprofessional adjective from the Cambridge Business English Dictionary © Cambridge University Press)
Focus on the pronunciation of unprofessional

Definitions of “unprofessional” in other dictionaries

Word of the Day


relating to behaviour between people that is pleasant and friendly, often despite a difficult situation

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More