immemorial usageglossary / immemorial usage A usage that has existed for a very long time; long-standing custom. See TIME IMMEMORIAL. [Cases: Customs and Usages 1. C.J.S. Customs and Usages § 1.] 词条贡献者 译员William,毕业于欧洲顶尖的高级翻译学院,专注翻译各种与区块链技术与数字货币有关的法律文件。