Definition of gerontocracy noun from the Oxford Advanced American Dictionary

 

gerontocracy

 noun
noun
NAmE//ˌdʒɛrənˈtɑkrəsi//
 
(pl. gerontocracies)[countable, uncountable]
 
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a state, society, or group governed by old people; government by old people
gerontocratic
 
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NAmE//dʒəˌrɑntəˈkræt̮ɪk//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: gerontocracy