Definitions

1. noun

A unit of land or territory held by a vassal in exchange for loyalty and military service to a lord or monarch.

“The fief was a vital part of the medieval feudal system, providing a means for lords to control and govern their territories.”

2. noun

A person’s or a group’s sphere of influence or control.

“The company has a significant fief in the tech industry, with multiple subsidiaries and joint ventures.”

3. noun

A domain or area of expertise.

“The professor’s fief is in the field of artificial intelligence, with a focus on machine learning and neural networks.”