Definition of gerontocrat in US English:

gerontocrat

noun

  • A member or leader of a state, society, or group governed by old people.

    ‘the village's aged leader is portrayed as a dictatorial gerontocrat’

Pronunciation

gerontocrat

/dʒəˈrɑn(t)əˌkræt//jəˈrän(t)əˌkrat/