1. a person, especially a diplomat, invested with full power to act on behalf of their government
Usage: formal; diplomatic

1. possessing or conferring full power to act independently
Usage: formal; diplomatic

Examples

• The plenipotentiary was authorized to negotiate and sign the treaty without further consultation.
• She served as a plenipotentiary ambassador to the United Nations.
• The king granted his minister plenipotentiary powers to settle the dispute.
• As plenipotentiary representative, he could make binding decisions on all matters.
• The conference required each nation to send a plenipotentiary delegate.
• With plenipotentiary authority, the envoy concluded the agreement in a single day.