In a company ,there are different departments or sections, the supervisor will be above a general employee in his/her section but will have no authority over other people in other departments. Boss:- He is at the top of everyone, in every section or departments.

Boss :- 1- An employer or a supervisor. 2- One who makes decisions or exercises authority. 3- A professional politician who controls a party or a political machine. supervisor :- 1- One who supervises. 2-One who is in charge of a particular department or unit, as in a governmental agency or school system. 3-One who is an elected administrative officer in certain U.S. counties and townships.