A one-party state is a political system where a single political party controls the government, and no other parties are allowed to compete for power. This means that the ruling party makes all the important decisions, and citizens typically have limited political choices. Elections, if they occur, often do not provide a genuine opportunity for opposition. In a one-party state, the government may suppress dissent and restrict freedoms to maintain control. Examples of one-party states include China, where the Communist Party holds power, and North Korea, governed by the Workers' Party. These systems can lead to a lack of political pluralism and reduced civil liberties.