議ぎ定てい書しょぎていしょCommon wordMeanings1nounprotocolRefers to an official document recording the terms of an international agreement, similar to a treaty but often supplementary or less formal.両りょう国こくは環かん境きょう保ほ護ごに関かんする議ぎ定てい書しょに署しょ名めいした。The two countries signed a protocol on environmental protection.
