Domicile is a fancy word for the place where you live. Whether it's a mansion on 5th Avenue or a tee-pee in the desert, if you live in it, it's your domicile.1. a dwelling place : place of residence : home 2. Law a : a person's fixed, permanent, and principal home for legal purposes The place where a person lives: Any change of domicile should be reported to the proper authorities. Domicile refers to the place you call home permanently. Your domicile is important for legal purposes such as paying taxes, voting, and claiming benefits. Domicile extends beyond the simple notion of a place of residence and signifies living in a country with the intent to remain there permanently. Where a decedent is domiciled at the time of his or her death determines which court has subject matter jurisdiction over the decedent's estate. A place of residence; house or home; abode.