<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> A referendum (plural: referendums or referenda) is a direct vote in which an entire electorate is invited to vote on a particular proposal . This may result in the adoption of a new law . In some countries, it is synonymous with a plebiscite or a vote on a ballot question . </P> <P> Some definitions of' plebiscite' suggest that it is a type of vote to change the constitution or government of a country . However, some other countries define it differently . For example, Australia defines' referendum' as a vote to change the constitution, and' plebiscite' as a vote that does not affect the constitution . In Ireland, the vote to adopt its constitution was called a "plebiscite", but a subsequent vote to amend the constitution is called a' referendum', and so is a poll of the electorate on a non-constitutional bill . </P> <P>' Referendum' is the gerundive form of the Latin verb refero, literally "to carry back" (from the verb fero, "to bear, bring, carry" plus the inseparable preposition re -, here meaning "back".) As a gerundive is an adjective, not a noun, it cannot be used alone in Latin and must be contained within a context attached to a noun such as Propositum qui referendum est populo, "A proposal which must be carried back to the people". The addition of the verb sum (3rd person singular, est) to a gerundive, denotes the idea of necessity or compulsion, that which "must" be done, rather than that which is "fit for" doing . Its use as a noun in English is thus not a strictly grammatical usage of a foreign word, but is rather a freshly coined English noun, which therefore follows English grammatical usage, not Latin grammatical usage . This determines the form of the plural in English, which according to English grammar should be "referendums". The use of "referenda" as a plural form in English (treating it as a Latin word and attempting to apply to it the rules of Latin grammar) is thus insupportable according to the rules of both Latin and English grammar alike . The use of "referenda" as a plural form is posited hypothetically as either a gerund or a gerundive by the Oxford English Dictionary, which rules out such usage in both cases as follows: </P>

Explain the difference between a plebiscite and a referendum
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