In politics, a national assembly is either a unicameral legislature, the lower house of a bicameral legislature, or both houses of a bicameral legislature together. In the English language it generally means "an assembly composed of the representatives of the nation." The population base represented by this name is manifestly the nation as a whole, as opposed to a geographically select population, such as that represented by a provincial assembly. The powers of a National Assembly vary according to the type of government. It may possess all the powers of government, generally governing by committee, or it may function solely within the legislative branch of the government.