[ tree-tee ]
See synonyms for: treatytreaties on

noun,plural trea·ties.
  1. a formal agreement between two or more states in reference to peace, alliance, commerce, or other international relations.

  2. the formal document embodying such an international agreement.

  1. any agreement or compact.

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Origin of treaty

1350–1400; Middle English trete<Anglo-French <Latin tractātustractate

Other words from treaty

  • non·trea·ty, noun, plural non·trea·ties.

Words Nearby treaty Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use treaty in a sentence

British Dictionary definitions for treaty


/ (ˈtriːtɪ) /

nounplural -ties
    • a formal agreement or contract between two or more states, such as an alliance or trade arrangement

    • the document in which such a contract is written

  1. any international agreement

  1. any pact or agreement

  2. an agreement between two parties concerning the purchase of property at a price privately agreed between them

  3. archaic negotiation towards an agreement

  4. (in Canada)

    • any of the formal agreements between Indian bands and the federal government by which the Indians surrender their land rights in return for various forms of aid

    • (as modifier): treaty Indians; treaty money

  5. an obsolete word for entreaty

Origin of treaty

C14: from Old French traité, from Medieval Latin tractātus treaty, from Latin: discussion, from tractāre to manage; see treat

Derived forms of treaty

  • treatyless, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012