Definition of functus officio in US English:

functus officio

adjective

Law
  • No longer holding office or having official authority.

    ‘he added that the court had become functus officio as it no longer had the power to modify the order he made’

Origin

Latin, from functus, past participle of fungi ‘perform’ (see function) and officio, ablative of officium ‘performance of a task’ (see office).

Pronunciation

functus officio

/ˌfəNG(k)təs əˈfiSHēō//ˌfəŋ(k)təs əˈfɪʃioʊ/