Citizenship is the status of a person recognized under the custom or law as being a legal member of a sovereign state. A person may have multiple citizenships and a person who does not have citizenship of any state is said to be stateless.

Nationality is often used as a synonym for citizenship in English – notably in international law – although the term is sometimes understood as denoting a person's membership of a nation (a large ethnic group). In some countries, e.g. the United States, the United Kingdom, nationality and citizenship can have different meanings (for more information, see Nationality versus citizenship).

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