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The quality of being plenipotent; (a conferment of) full power or authority.
Early 17th century; earliest use found in Briefe Information Affaires Palatinate. From post-classical Latin plenipotentia full power or authority from plenipotent-, plenipotens + -ia see -ency, and compare potency. Compare Spanish plenipotencia, Portuguese plenipotência, Italian plenipotenza.