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: something previously mentioned
: the same authority used in citations to cases and other works to refer to an immediately preceding reference compare infra, supra NOTE: Idem is usually used in the form of its abbreviation id.[In Bally, the plaintiff also claimed…403 Mass. at 720-21. The [court] denied the claim…Id. at 721 "R. T. Gerwatowski"]
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.