Definition of arrière-fief in English:

arrière-fief

Pronunciation /ˌarɪɛːˈfiːf/

noun

(also arriere-fief)
historical Law
  • A fief which is held from an intermediary rather than the original feoffor, a sub-fief.

Origin

Early 18th century. From French arrière fief from arriere behind + fief.