the formal occasion, when a country formally accedes to a group of countries or accepts an agreement, the United Nations Convention to Combat Desertification: an international agreement to help countries where no rain has the effect of making the land so dry that it cannot be used for agriculture An agreement between two or more countries or persons, According to international law, a ceasefire is a legal agreement (often in a document) that ends the struggle between the “warmongers” of a war or conflict. .