Having or demonstrating a high degree of knowledge or skill
A person with a high degree of knowledge or skill in a particular field
He slipped into that professional persona.
The messy studio from last week had been transformed into a professional art gallery.
members of the professional classes, are qualified to vote by their position.
No one but Clarissa could be so cool and professional at the same time.
After watching the professional baseball game, Johnny aspired to become a famous athlete one day.