(e.g. of a sportsman or athlete) playing for pay on a part-time basis / (of a team) composed of semi-professional players

a semi-professional sportsman or athlete

Descending far below the surface; opening or reaching to great depth; deep. / Very deep; very serious

(obsolete) The deep; the sea; the ocean. / (obsolete) An abyss.

(obsolete) To cause to sink deeply; to cause to dive or penetrate far down. / (obsolete) To dive deeply; to penetrate.

A person who belongs to a profession / A person who earns their living from a specified activity / (euphemistic) A prostitute / A reputation known by name / An expert

Of, pertaining to, or in accordance with the (usually high) standards of a profession. / That is carried out for money, especially as a livelihood. / (by extension) Expert.

Openly declared or acknowledged. / Professing to be qualified. / Admitted to a religious order.

simple past tense and past participle of profess

(accounting) The total revenue minus costs properly chargeable against goods sold.