Definition of plenipotentiality in English:

plenipotentiality

Pronunciation /ˌplɛnɪpəˌtɛnʃɪˈalɪti/

noun

rare
  • The quality of being plenipotential, or an instance of this; the possession of full authority, all-powerfulness.

Origin

Mid 17th century; earliest use found in Nathaniel Ward (1578–1652), clergyman and compiler of a law code for Massachusetts. Probably from plenipotential (although this is first attested slightly later) + -ity, after potentiality.