http://humanresources.about.com/od/glossarye/g/exempt.htm

Exempt Employee :

Definition: [p An exempt employee is an employee who, because of his or her positional duties and responsibilities and level of decision making authority is exempt from the overtime provisions of the Fair Labor Standards Act (FLSA). Exempt employees are expected, by most organizations, to work whatever hours are necessary to accomplish the goals and deliverables of the position. Thus, exempt employees have more flexibility in their schedules to come and go as necessary to accomplish work than non-exempt or hourly employees.