"professional" in the noun sense
1. professional, professional person
a person engaged in one of the learned professions
2. professional, pro
an athlete who plays for pay
3. master, professional
an authority qualified to teach apprentices
"professional" in the adjective sense
1. professional
engaged in a profession or engaging in as a profession or means of livelihood
"the professional man or woman possesses distinctive qualifications"
"began her professional career after the Olympics"
"professional theater"
"professional football"
"a professional cook"
"professional actors and athletes"
2. professional
of or relating to or suitable as a profession
"professional organizations"
"a professional field such as law"
3. professional
characteristic of or befitting a profession or one engaged in a profession
"professional conduct"
"professional ethics"
"a thoroughly professional performance"
4. professional
of or relating to a profession
"we need professional advice"
"professional training"
"professional equipment for his new office"
5. professional
engaged in by members of a profession
"professional occupations include medicine and the law and teaching"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License