Law Dictionary


noun re·la·tor \rē-ˈlā-tər\

Legal Definition of relator

  1. :  a party other than the plaintiff upon whose information, knowledge, or relation of facts an action is brought when the right to bring the action is vested in another: as a :  the private person who brings a qui tam action b :  a party who has standing and on whose behalf a writ (as of mandamus) is petitioned for by the state as plaintiff relator then filed…a petition in prohibition requesting this court to prohibit respondents from transferring the funds — State ex rel. Tate v. Turner, 789 S.W.2d 240 (1990) — see also ex relatione

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a brief usually trivial fact

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