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functus officio

adjective func·tus of·fi·cio \ ˈfəŋk-təs-ə-ˈfi-shē-ō, ˈfu̇ŋk-tu̇s-ȯ-ˈfē-kē-ō \

legal Definition of functus officio

:of no further official authority or legal effect
  • the warrant… had been returned and was functus officio
  • —Cady v. Dombrowski, 413 U.S. 433 (1973)
  • once an arbitrator makes an award she is functus officio
—used especially of an officer who is no longer in office or of an instrument that has fulfilled its purpose

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Origin and Etymology of functus officio

Latin, having performed his duty, having served its purpose

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