Meaning of the word unprofessional in English

What does unprofessional mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

unprofessional

US /ˌʌn.prəˈfeʃ.ən.əl/
UK /ˌʌn.prəˈfeʃ.ən.əl/

Adjective

not showing the skill, good judgment, or polite behavior that is expected from a person who is trained to do a job well

Example:
His behavior at the meeting was completely unprofessional.
It's unprofessional to discuss client matters with outsiders.