This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The estate or domain of a feudal lord.

n. Something over which one dominant person or group exercises control: "long the independent head of a powerful fiefdom within the Police Department” ( David Burnham).

n. The estate controlled by a feudal lord; a fief.

n. Any organization in the control of a dominant individual. Primarily used with a critical or pejorative connotation.

n. the domain controlled by a feudal lord

n. an organization that is controlled by a dominant person or group

"Mayor Daley thinks that his fiefdom is exempt from the Founding documents."

demesne    land    domain    organization    organisation   

chiefdom   

countship    land-tenure    overlordship    daimi    vassalage    abattoir    doghole    régime    baronage    overlord