What is profession? professional? and their differences?

Profession definition.

• the body of people in a learned occupation; "the news spread rapidly through the medical profession"; "they formed a community of scientists"
• an occupation requiring special education (especially in the liberal arts or sciences)
• an open avowal (true or false) of some belief or opinion; "a profession of disagreement"
• affirmation of acceptance of some religion or faith; "a profession of Christianity"
  wordnetweb.princeton.edu/perl/webwn

Professional definition.

• engaged in a profession or engaging in as a profession or means of livelihood; "the professional man or woman possesses distinctive qualifications ...
• a person engaged in one of the learned professions
• an athlete who plays for pay
• master: an authority qualified to teach apprentices
  wordnetweb.princeton.edu/perl/webwn

In my own opinion, profession is the job description of a certain individual(s), the professionals. Thus, it is the career they had taken and the best work they had practiced. In contrary, Professionals are referred to us the people having the profession.