Definition of potentacy in English:

potentacy

noun

rare
  • The state or rule of a potentate; supreme power.

Origin

Late 16th century; earliest use found in Abraham Fleming (c1552–1607), author, literary editor, and Church of England clergyman. From potentate: see -acy.

Pronunciation

potentacy

/ˈpəʊtntəsi/