The definition of a pro is a professional, or the yes side of a debate question.
A highly skilled person; an expert:
An expert in a given field.
(Brit., Informal) An expert; dab hand
(--- Informal) A person who is very quick, adroit, or skilled at something; expert
(Computing) A computer program or script used to simplify complex operations, often for an inexperienced user.
Authority is defined as a person who is considered an expert in his field.
(Sports) A first-year player, especially in a professional sport.
An amateur is an individual who is new to, or not yet skilled in, a particular skill or sport.
A person who is acquiring a trade, craft, or skill under specified conditions, usually as a member of a labor union
A newcomer, especially one who is unfamiliar with the ways of a place or group.
Specialist is defined as an expert in some field or a person who concentrates his or her energies on a specific field.
The quality of being able to do something, especially the physical, mental, financial, or legal power to accomplish something.
Find another word for professionals. In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for professionals, like: rookies, masters, pros, experts, adepts, aces, dabs, whizzes, wizards, authorities and amateurs.