fief

noun3

1. •
   (historical) Land held of a superior, particularly on condition of homage, fealty, and personal service, especially military service.

   • Where a vassal kills the brother, son, or grandson of his lord, he should lose his fief on account of it. — 2001
2. •
   (figurative) A territory, a domain, an area over which one exercises lordly control, particularly with regard to corporate or governmental bureaucracies.
3. •
   (figurative) Synonym of estate: any land, when considered as a region over which the owner exercises lordly control.