Definition of plenipotent in US English:

plenipotent

adjective

  • Invested with or possessing full power or authority.

Origin

Mid 17th century; earliest use found in Remonstrance of Nobility. From post-classical Latin plenipotent-, plenipotens from classical Latin plēni- + potēns.

Pronunciation

plenipotent

/plɪˈnɪpət(ə)nt/