A referendum (plural: referendums or referenda) or plebiscite is a direct vote in which an entire electorate is asked to either accept or reject a particular proposal. This may be the adoption of a new constitution, a constitutional amendment, a law, the recall of an elected official or simply a specific government policy.

Certain kinds of referendums held in some states of the United States are referred to as ballot measures or propositions. The referendum or plebiscite is a form of direct democracy.

For a technical definition see vote.

See a list of all referenda for which there are relevant materials at openpolitics.ca itself.

This page disambiguates several purposes or reasons someone may seek information on a referendum.