An international agreement in writing between two states or a number of states. They are binding in international law; some create law only for those states that are parties to them.
(Bible) an agreement between God and his people in which God makes certain promises and requires certain behavior from them in return
enter into a covenant
agree to a covenant
a signed written agreement between two or more parties (nations) to perform some action
enter into a covenant or formal agreement; "They covenanted with Judas for 30 pieces of silver"; "The nations covenanted to fight terrorism around the world"