a deliberative body of persons, usually elective, who are empowered to make, change, or repeal the laws of a country or state; the branch of government having the power to make laws, as distinguished from the executive and judicial branches of government.

noun

assembly , body , chamber , congress , council , diet , house , house of representatives , lawmakers , parliament , plenum , senate , voice of the peoplenotes:legislation is the act of making or enacting laws , while legislature is the body of people who make or amend or repeal laws