Definition of heptarchy in US English:

heptarchy

noun

  • 1A country or region consisting of seven smaller, autonomous regions.

    1. 1.1 Government by seven rulers.
      • ‘But if I know the circumstances or the people, I am of the opinion that this heptarchy cannot stand long.’

Origin

Late 16th century: from hepta- ‘seven’ + Greek arkhia ‘rule’, on the pattern of tetrarchy.

Pronunciation

heptarchy

/ˈhɛpˌtɑrki//ˈhepˌtärkē/