The term 'OUSTER' is a synonym for the term 'EXPULSION FROM OFFICE'. It is used to describe the act of removing someone from a position of power or authority, usually due to misconduct or incompetence. This can be done through legal means, such as impeachment, or through informal means, such as a vote of no confidence. In either case, the person is removed from their position and is no longer able to serve in that capacity.