Impeachment is the process by which a legislative body levels charges against a government official. It does not mean removal from office; it is only a statement of charges, akin to an indictment in criminal law. Once an individual is impeached, he or she must then face the possibility of conviction by a legislative vote, which judgment entails removal from office.
Because impeachment and conviction of officials involve an overturning of the normal constitutional procedures by which individuals achieve high office (election, ratification, or appointment) and because it generally requires a supermajority, they are usually reserved for those deemed to have committed serious abuses of their office. In the United States, for example, impeachment at the federal level is limited to those who may have committed "Treason, Bribery, or other high crimes and misdemeanors".