Dictionary entry

Plenipotentiary

Webster's Dictionary 1913

Plen′i‐po‐ten″ti‐a‐ry (plĕn″ĭ‐pō̍‐tĕn″shĭ‐ā̍‐ry̆), n.; pl.Plenipotentiaries (#). [LL. plenipotentiarius: cf. F. plénipotentiaire.] A person invested with full power to transact any business; especially, an ambassador or envoy to a foreign court, with full power to negotiate a treaty, or to transact other business.