Definition
Indivisum (Latin) refers to property or interests held by two or more persons in common without partition — that is, undivided. When property is held in indivisum, no individual co-holder has a separately delineated share of the physical thing itself; each holds an undivided interest in the whole. The concept underpins the broader law of co-ownership, describing the condition of property before any formal division among co-tenants or co-heirs has taken place.
Common Language
This is a Latin legal term with no meaningful common English counterpart. The root sense — "not divided" — tracks the ordinary meaning of the prefix and root, but the term appears exclusively in legal and historical contexts. No Wiktionary or Webster's 1913 entry applies. Omitted accordingly.
Common Confusion
Indivisum describes a condition of property — the state of being undivided — and should not be confused with the substantive ownership relationships that may produce that condition, such as joint tenancy or tenancy in common. A tenancy in common, for example, involves undivided interests (property held in indivisum), but the legal incidents of that relationship — including the right of survivorship or its absence — are distinct from the mere fact of non-partition. Similarly, indivisum should not be conflated with inalienability; property held in indivisum may often be alienated by a co-owner's share, even if the physical thing itself remains undivided.
Why It Matters in Research
Researchers encountering indivisum in historical sources — particularly those drawing on Roman law, canon law, or early common law — should treat it as a descriptive status term rather than a term of art carrying fixed legal consequences. Its significance lies in what it signals: that partition has not occurred, which then triggers a separate body of rules governing the rights and obligations of co-owners.
Several traps await the unwary researcher:
First, the term appears almost exclusively in Latin-language sources and in English-language texts heavily influenced by civilian or ecclesiastical tradition. It is rarely found in purely common law digests after the early modern period, where equivalent concepts are expressed in English (undivided, in common, without partition).
Second, because indivisum is a condition rather than a title or estate, it does not itself determine the nature of the co-ownership. A researcher finding property described as held in indivisum must look elsewhere in the source to determine whether the underlying relationship is joint tenancy, tenancy in common, coparcenary, or some civilian equivalent.
Third, in inheritance contexts — particularly in civil law jurisdictions and in ecclesiastical property records — indivisum frequently appears to describe the state of an estate before distribution among heirs. This usage connects to the law of succession and the administration of decedents' estates, and should prompt the researcher to look for associated partition proceedings or instruments of division.
For corpus researchers, indivisum will most often surface as a modifier or predicate descriptor in conveyancing instruments, probate records, and treatises drawing on Roman or civil law foundations. Its presence is a reliable marker of civilian influence in the source.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed., Supplemental) provides the only historical dictionary entry identified for this term: "That which two or more persons hold in common without partition; undivided." This definition is functional and accurate as far as it goes, but it is notably sparse. It identifies the core meaning — co-ownership without division — but provides no guidance on the legal consequences of that status or its relationship to specific forms of co-tenancy.
Historical legal dictionaries drawing on Roman law sources, such as those within the civilian tradition, would have offered richer treatment. The concept in Roman law (res in indiviso) was well developed, governing the rights of co-owners (socii or communiones) prior to the actio communi dividundo, the action for partition. The Black's entry reflects the term's reduced importance in common law practice by the time of its publication — useful enough to include, but no longer a load-bearing concept in Anglo-American doctrine.
No other shelf sources in the identified corpus include an entry for indivisum. Researchers should not assume that absence from English-language dictionaries indicates legal irrelevance; the term's natural habitat is Latin-language and civilian sources where it may appear frequently without dictionary support.
Jurisdictional Note
The term is of greatest practical relevance in jurisdictions with civilian or mixed legal traditions — Louisiana, Quebec, and historically, jurisdictions under Spanish or French colonial influence. In common law jurisdictions, the concept is fully expressed through English-language doctrine on undivided interests and partition, making the Latin term largely vestigial in modern practice.