Professional??

It was Professional Ethics class n the question was `who is a professional?`, people came up with their own answers. one of the things that scares me is public speaking. so, i just kept my mouth shut... not only out of fear but also lack of intrest in answering in the class..
i wanted to mention a defination for professional from LS Ganesh [ DoMS HOD] : some one who puts his personal feelings, emotions, opinions aside and does what ought to be done... [he defined it as an opposite to amateur ]
coming to a formal defination of professional : A professional is a worker required to possess a large body of knowledge derived from extensive academic study , with the training almost always formalized.