GERONTOCRACY Meaning of GERONTOCRACY in English [ ˌdʒɛrən'tɒkrəsi ]■ noun a state, society, or group governed by old people. ↘government based on rule by old people.Derivativesgerontocrat noungerontocratic adjective Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004