treaty

noun

trea·​ty ˈtrē-tē 

plural treaties

1

a

: an agreement or arrangement made by negotiation:

(1)

: a contract in writing between two or more political authorities (such as states or sovereigns) formally signed by representatives duly authorized and usually ratified by the lawmaking authority of the state

(2)

: private treaty

b

: a document in which such a contract is set down

2

: the action of treating and especially of negotiating

Synonyms

• accord
• alliance
• compact
• convention
• covenant
• pact

Examples of treaty in a Sentence

a nuclear test ban treaty

in accordance with a treaty between the United States and the tribes of the Pacific Northwest, commercial fishing of certain kinds of salmon is limited to Native Americans

Recent Examples on the Web

These claims put China at odds with several neighbors, including the United States' treaty ally, the Philippines, which has been pushing back against Chinese expansion within its exclusive economic zone. —Micah McCartney, MSNBC Newsweek, 19 June 2025

China joins 81 nations that have signed the treaty. —Troy Aidan Sambajon, Christian Science Monitor, 16 June 2025

Likewise, the Trump administration should be trying to revive the arms treaties and understood codes of conduct that helped to stabilize the Cold War’s nuclear standoff — and good U.S. intelligence will be crucial to that effort. —Marc Champion, Mercury News, 13 June 2025

In October 2022, Bukele’s new attorney general announced that criminals would first have to serve their sentence in El Salvador before being sent to the U.S. — an interpretation of the country’s extradition treaty that differed from the previous Supreme Court. —T. Christian Miller, ProPublica, 12 June 2025

Word History

Etymology

Middle English trete, from Anglo-French treté, from past participle of treter to discuss, treat

First Known Use

14th century, in the meaning defined at sense 2

Phrases Containing treaty

• nonaggression pact/treaty
• nonaggression treaty/pact
• peace treaty
• private treaty
• treaty port

Rhymes for treaty

• beati
• beaty
• meaty
• peaty
• smriti
• sweetie
• banditti
• cochiti
• entreaty
• graffiti
• wapiti

Kids Definition

treaty

noun

trea·​ty ˈtrēt-ē 

plural treaties

: an agreement or arrangement made by negotiation

especially : one between two or more states or rulers

Legal Definition

treaty

noun

trea·​ty

plural treaties

1

: the action of treating and especially of negotiating

2

: an agreement or arrangement made by negotiation: as

a

: private treaty

b

: a contract in writing between two or more political authorities (as states or sovereigns) formally signed by representatives duly authorized and usually ratified by the lawmaking authority of the state

the President…shall have power, by and with the advice and consent of the Senate, to make treaties

—U.S. Constitution art. II

compare executive agreement

3

: a document embodying a negotiated agreement or contract

4

: an agreement or contract (as between companies) providing for treaty reinsurance

Etymology

Anglo-French treté, from Middle French traité, from Medieval Latin tractatus, from Latin, handling, treatment, from tractare to treat, handle