A referendum is a direct vote by the electorate on a proposal, law, or political issue. It is a way for citizens to express their opinion on a specific issue, and the result of the referendum may lead to the adoption of a new policy or specific law. Referendums can be binding or advisory, and they can be initiated by different parties, such as the government or citizens. In some countries, a referendum is synonymous with and also known as plebiscite, votation, popular consultation, ballot question, ballot measure, or proposition. The term "referendum" covers a variety of different meanings, and the terminology is different depending on the country that holds them. Referendums can be used to change constitutions or legislation, or any sort of other written rules.