A proposal put to the people for a vote.  

In a NSW State referendum, a proposal must be approved by both Houses of the NSW Parliament and then by a majority of voters may be held to gauge voter opinion on an issue, to approve proposed changes to the New South Wales Constitution, or to resolve a deadlock between the two Houses of Parliament in relation to the passing of a bill.

In a Federal referendum, to succeed the proposal must be supported by a majority of voters across Australia, as well of a majority of the states. Unlike a plebiscite, the result of a referendum is binding on the Government.