functus officio
C2CEFR level
97/100Rarity: very rare
TechnicalRegister
Having discharged one's office such that no further authority to act on the matter remains.
Once the tribunal handed down its final award it was functus officio and could not reopen the question of quantum.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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