Definition
Animus manendi (Latin: "intention of remaining") is the intent to establish a permanent residence in a place. It is one of the two essential components of domicile: physical presence in a location combined with the mental intention to remain there indefinitely. Without animus manendi, a person may be a temporary resident or visitor, but cannot acquire a new domicile — and, equally important, cannot lose an existing one.
The concept operates as a threshold test. Courts do not demand proof that a party intended to stay forever, only that they had no present intention of leaving for another permanent home. The absence of animus manendi means the old domicile persists regardless of how long the physical absence has lasted.
Why It Matters in Research
Domicile questions arise across a wide range of legal contexts — diversity jurisdiction, choice of law, probate, voting rights, matrimonial proceedings, and service of process — making animus manendi a term researchers will encounter in sources spanning centuries and subject areas. The critical trap is that older cases and treatises treat domicile doctrine in ways that do not map cleanly onto modern statutory or constitutional frameworks. A nineteenth-century equity court analyzing domicile for inheritance purposes reasoned differently from a federal court assessing diversity jurisdiction under 28 U.S.C. § 1332.
Researchers should also note that animus manendi appears in tandem with its counterpart term animus revertendi (intention of returning), which Burrill's specifically cross-references. The two terms are not opposites but complements: animus revertendi governs cases where a person is physically absent from a claimed domicile and must demonstrate intent to return. Understanding the pairing is essential for correctly interpreting domicile disputes in historical sources.
The Kent's Commentaries citation appearing in all three historical dictionaries (1 Kent, Comm. 76–77) signals that this doctrine was canonized early in American law and treated as settled. Researchers tracing the development of domicile doctrine in American courts will find Kent a foundational node, but should be alert to subsequent doctrinal refinement — particularly around the question of what evidence suffices to establish the requisite intent, which has grown considerably more nuanced in modern case law.
Jurisdictional treatment of domicile, and therefore the weight given to animus manendi as a formal test, can vary in statutory contexts. Immigration and nationality law, for instance, uses "domicile" and "residence" with technical meanings that diverge from common law doctrine.
Historical Dictionary Support
All three source dictionaries are in substantial agreement, with Black's and Burrill's offering nearly identical language drawn from Kent's Commentaries. Bouvier adds the useful clarification that without animus manendi, not only is no new domicile gained, but the old domicile is retained — a point that is practically significant and worth noting when the historical sources are used in research.
None of the three historical sources define the evidentiary standards for proving animus manendi, which is where modern doctrine has developed most substantially. The historical dictionaries treat the concept as definitional rather than analytical, leaving the hard questions — how courts weigh declarations of intent against objective conduct, how the intent of minors or legally incapacitated persons is assessed, or how intent is evaluated for corporate or institutional "persons" — entirely to case law and treatise commentary outside the dictionary form.
Jurisdictional Note
Domicile doctrine is primarily a matter of common law and varies at the margins across jurisdictions, particularly where state statutes define residency for specific purposes (taxation, voting, divorce). Federal courts applying diversity jurisdiction use a functional equivalent test that draws on animus manendi principles but is governed by federal common law rather than any single state's domicile rules.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Domicile; Conflict of Laws — Domicile and Residence.