Nolo's Plain-English Law Dictionary

Domicile

The state in which a person has or intends to maintain permanent residence, or the state in which a business locates its headquarters. Domicile governs such matters as the state in which a deceased person's estate is probated, where a party can begin divorce proceedings, and whether there is "diversity of citizenship" between two parties that may give federal courts jurisdiction over a lawsuit. A person may have many residences but only one legal domicile.
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