/ ˈtriːti; NAmE / noun
( pl. -ies ) a formal agreement between two or more countries :
the Treaty of Rome
a peace treaty
to draw up / sign / ratify a treaty
Under the terms of the treaty , La Rochelle was ceded to the English.
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WORD ORIGIN
late Middle English : from Old French traite , from Latin tractatus treatise, from tractare to handle, frequentative of trahere draw.