Definition
Animus morandi is a Latin maxim meaning "the intention to remain" or "the intention to delay." In legal usage, the phrase appears in two related but distinct senses:
1. Domicile and residence law: The intention to remain in a place, used to distinguish mere physical presence from legally significant residence or domicile. A person physically present in a jurisdiction acquires domicile there only when presence is accompanied by animus morandi — the subjective intent to remain indefinitely or permanently. Without this intent, presence is transitory and does not establish domicile.
2. Procedural and equitable contexts: The intention to delay, hinder, or disturb legal proceedings. In this sense, the phrase describes a party's purpose in taking some action — filing a motion, seeking continuance, or interposing a defense — not on the merits but to obstruct or slow the process. Courts historically invoked this sense when evaluating whether conduct amounted to bad-faith delay.
Common Confusion
The two senses of animus morandi are easy to conflate because both turn on intent in connection with remaining or delaying, but they operate in entirely different legal contexts. The domicile sense asks where a person intends to make their home; the procedural sense asks whether a party's purpose is to obstruct. A researcher encountering the phrase in older equity reports should not assume the domicile meaning governs.
Animus morandi should also be distinguished from animus manendi (intent to remain permanently, closely tied to domicile in Roman and civil law tradition) and from animus revertendi (intent to return). These terms overlap in domicile analysis but carry distinct technical weight in civil law jurisdictions and historical treatises.
Why It Matters in Research
The dual meaning of animus morandi is a genuine trap in historical sources. Pre-twentieth-century equity reporters and civil procedure texts use the term interchangeably across both senses, and context does not always make the intended meaning clear. A treatise passage discussing animus morandi in the context of injunctive relief is almost certainly invoking the delay/obstruction sense, while a conflict-of-laws or domicile opinion is invoking the residency intent sense.
In domicile research, animus morandi is the subjective counterpart to the physical act of taking up residence. The term appears frequently in nineteenth-century American and English cases dealing with citizenship, voter qualification, tax liability, and service of process. Modern courts have largely replaced the Latin phrase with "intent to remain" or "intent to establish domicile," so researchers using full-text databases should search both the Latin and its English equivalents to avoid missing relevant authority.
The Bouvier attribution to "Tayler" signals that the procedural/equitable sense of the term was drawn from specific treatise authority rather than general usage. Researchers tracing the obstruction sense should be aware that it may have a narrower lineage than the domicile sense and may not appear widely in American common law sources outside equity practice.
For conflict-of-laws work, animus morandi connects directly to the civilian tradition of domicile analysis. Civil law jurisdictions — and American courts applying civilian-influenced frameworks — tend to make the animus component explicit in a way that common law courts often do not, folding intent into the broader factual inquiry rather than naming it separately.
Historical Dictionary Support
Black's Law Dictionary defines animus morandi simply as "the intention to remain, or to delay," presenting both senses without distinction or elaboration. Bouvier adds the gloss "hindering, or disturbing" and attributes the entry to "Tayler," which likely refers to a treatise authority rather than a case. The Tayler attribution has not been widely reproduced in subsequent American legal dictionaries, and the specific source should be treated as unverified without independent confirmation.
Neither Black's nor Bouvier develops the domicile application in depth under this heading, preferring instead to handle domicile intent under entries for DOMICILE, ANIMUS MANENDI, and related terms. The cross-reference in Bouvier to "See ANIMO" is instructive: the full range of animus-based maxims was treated as a family in nineteenth-century dictionaries, and researchers should consult the ANIMO cluster to understand how these phrases interacted in period usage.
Both sources treat animus morandi as a term of art with a fixed meaning, but the dual usage in actual legal writing — across domicile law and equitable procedure — suggests the dictionaries present a cleaner picture than historical practice delivered.
Jurisdictional Note
The domicile sense of animus morandi carries most weight in civil law jurisdictions and in American conflict-of-laws analysis influenced by civilian sources. Common law courts frequently address the same concept without using the Latin phrase. The procedural obstruction sense is largely historical and is not a term of art in modern American civil procedure.