adj. Invested with or conferring full powers: a plenipotentiary deputy. n. pl. plen·i·po·ten·ti·ar·ies A diplomatic agent, such as an ambassador, who is fully authorized to represent their government. [Medieval Latin plēnipotentiārius, from Late Latin plēnipotēns, plēnipotent-, invested with full power : Latin plēnus, full; see pelə-1 in the Appendix of Indo-European roots + Latin potēns, powerful; see POTENT.] |
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