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 法律翻译Max,毕业于一所培养最顶级翻译人才的语言学院,擅长翻译有关电信和互联网领域的法律文件。