/ 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.
late Middle English : from Old French traite , from Latin tractatus treatise, from tractare to handle, frequentative of trahere draw.