noun

plenipotentiary

plen-ih-poh-TEN-shuh-ree

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Plenipotentiary (noun) means a person given complete authority to act on behalf of a government, especially in diplomatic negotiations. Example: “The two nations sent plenipotentiaries to Vienna to settle the border dispute.”

noun

formal A person given complete authority to act on behalf of a government, especially in diplomatic negotiations.

"The two nations sent plenipotentiaries to Vienna to settle the border dispute."

"As a plenipotentiary, she could sign the treaty without checking back with her government."

"The king appointed his plenipotentiary to negotiate the peace terms."

adjective

formal Given full power to act, or relating to someone who holds such power.

"The ambassador travelled with plenipotentiary authority to conclude the agreement."

"His title was Minister Plenipotentiary to the court."

"The committee granted him plenipotentiary status for the negotiations."

How to use plenipotentiary

Learner’s notes

In plain EnglishSomeone (or something) with full power to act on another's behalf, usually in diplomacy.

When to use it

This is a formal, largely diplomatic term rather than everyday vocabulary.

Memory tip

Remember the two Latin building blocks: plenus (full) and potens (powerful), which together spell out the idea of full power.

Trace the full origin ↓

Common pairings

plenipotentiary powers minister plenipotentiary plenipotentiary authority act as a plenipotentiary

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C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

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Can you complete this real example?

As a _____, she could sign the treaty without checking back with her government.

Etymology

The word comes from Medieval Latin plenipotentiarius, meaning someone holding full power. That in turn goes back to Late Latin plenipotens, formed by joining plenus, meaning full, with potens, meaning powerful or mighty.

Origin: Latin

Synonyms

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plenipotent

Rhymes for plenipotentiary

vary Mary nary wary diary ovary apiary canary salary binary ossuary January

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Frequently asked questions

What does plenipotentiary mean?

It describes a person, often a diplomat, who has been given full authority to act and make binding decisions on behalf of a government or ruler.

Is plenipotentiary only used for diplomats?

It is most commonly used for diplomatic agents, but it can describe anyone formally invested with complete authority to handle a particular matter.

Why does plenipotentiary sometimes come after the noun, as in Minister Plenipotentiary?

This placement follows an older pattern found in some legal and diplomatic titles, where the adjective trails the noun it describes.

What is the meaning of plenipotentiary?

"plenipotentiary" (noun) means a person given complete authority to act on behalf of a government, especially in diplomatic negotiations.