A legislature is a governing body that makes laws and can also amend or repeal them.
The word legislature comes from the Latin word for "law" — legis. In the US, each state has a legislature — made up of the elected state senators and assemblymen or women, or representatives. The US Congress is the national legislature. These bodies, whose members are often referred to as "law-makers," make up the legislative branch of government, as distinct from the executive and judicial branches.