An "ex-president" refers to a former head of state who has completed their term in office or has stepped down from their position. This title is often used to describe individuals who have served as the president of a country, such as the United States or France, and may have left office due to elections, term limits, or resignation. Ex-presidents may continue to be involved in public life, often engaging in speaking events, writing books, or participating in charitable activities. They may also provide advice to current leaders or contribute to political discussions, leveraging their experience and knowledge gained during their time in office.