Bedeutung von “professional” im Essential American English Dictionary

professional

adjective us /prəˈfeʃ·ə·nəl/

B1 Someone is professional if he or she gets money for a sport or activity that most people do as a hobby:

a professional athlete/musician
→ Opposite amateur adj

B1 showing skill and careful attention:

a professional attitude

relating to a job that needs special training or education:

You should get some professional advice about your finances.
professionally adverb

He’s good enough at football to play professionally.

(Definition von “professional adjective” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)