adj. & n.
adj. 1 of or belonging to or connected with a profession. 2 a having or showing the skill of a professional, competent. b worthy of a professional (professional conduct). 3 engaged in a specified activity as one's main paid occupation (cf. AMATEUR) (a professional boxer). 4 derog. engaged in a specified activity regarded with disfavour (a professional agitator).
n. a professional person. professional foul a deliberate foul in football etc., esp. to prevent an opponent from scoring. professionally adv.