An "Ex-President" refers to a former head of state who has completed their term in office and is no longer serving in that capacity. This title is often used to describe individuals who have held the highest political office in a country, such as the President of the United States or the Prime Minister of the United Kingdom. Ex-presidents may continue to influence politics and public life through speeches, writings, or involvement in various organizations. After leaving office, ex-presidents often engage in various activities, including public speaking, writing memoirs, or participating in charitable work. They may also provide guidance to current leaders or serve on advisory boards. Some ex-presidents, like Barack Obama or George W. Bush, have established foundations to address social issues and promote civic engagement.