Definition of heptarchy in English:

heptarchy

noun

  • 1A state or region consisting of seven autonomous regions.

    1. 1.1[mass noun] 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

/ˈhɛptɑːki/