
Senior citizen is a common polite designation for an elderly person in both UK and US English, and it implies or means that the person is retired. Synonyms include pensioner in UK English and retiree and senior in US English. It is used in general usage instead of traditional terms such as "old person", "old-age pensioner", or "elderly" as a courtesy and to signify continuing relevance of and respect for this population group as "citizens" of society, of "senior" rank.