Definition
Jus legitimum (Latin: "lawful right" or "legal right") is a civil law term denoting a right enforceable through the ordinary course of law — that is, a right for which a recognized legal remedy existed and could be pursued through established legal process without special intervention or equitable relief. It stands in contrast to rights that depended on grace, discretion, or exceptional jurisdiction to be vindicated.
The term appears most prominently in discussions of the law of uses and property, where courts drew a distinction between rights enforceable as a matter of strict law and interests that required equitable enforcement. A jus legitimum was a complete legal right: its holder could act on it, defend it, and enforce it in a court of law as a matter of course.
Common Confusion
Researchers should take care to distinguish jus legitimum from two companion terms that appear in the same analytical framework:
JUS FIDUCIARIUM — a right held in trust or conscience, enforceable in equity but not at strict law. Before the Statute of Uses, this described the position of a cestui que use.
JUS PRECARIUM — a right held at the pleasure or sufferance of another, revocable without legal remedy. This describes the weakest category of entitlement in the Blackstonian taxonomy.
The three terms form a graduated taxonomy. Conflating jus legitimum with jus fiduciarium in particular distorts the historical analysis of the uses doctrine and the effect of the Statute of Uses.
Why It Matters in Research
This term surfaces almost exclusively in older common law treatises and historical property scholarship, particularly in discussions of uses, trusts, and the distinction between legal and equitable interests. Researchers encountering jus legitimum in historical sources should understand that it marks one side of a foundational common law binary: legal right versus equitable interest.
The term's most significant analytical context is the law of uses before and after the Statute of Uses (1535). A cestui que use held an equitable interest enforceable only in Chancery; once the Statute executed the use, that interest was converted into a jus legitimum — a full legal right. This transformation is the linchpin of early modern property law analysis and explains why the phrase appears repeatedly in readings and lectures on uses, including Bacon's Reading on the Statute of Uses.
Researchers should also be alert to Blackstone's usage at 2 Bl. Comm. 328, which is the anchor citation in all three historical dictionary entries. Blackstone discusses jus legitimum in contrast to jus fiduciarium (a right in trust or conscience) and jus precarium (a right dependent on the will of another). Locating the passage in context is essential — Blackstone uses these three categories to classify the spectrum of property rights, and understanding jus legitimum requires reading it against those companion terms.
In New York case law, Cowen J.'s discussion in 2 Hill's (N.Y.) R. 418, 424 offers a nineteenth-century American court's application of the concept, making it useful for researchers tracking how civil law categories were absorbed into early American common law jurisprudence.
Historical Dictionary Support
All three source dictionaries agree on the core meaning: a legal right enforceable in the ordinary course of law. The definitions are nearly identical, with minor variations in phrasing. Black's (both editions) and Burrill align on the Blackstone citation as the primary authority. Burrill adds the reference to Bacon's Reading on Uses and the New York Hill's Reports citation, making it the most useful of the three for tracing the term's practical application in Anglo-American courts.
None of the three dictionaries elaborate on the term's analytical context within the uses framework or its relationship to jus fiduciarium and jus precarium — a gap that limits their utility without the primary sources they cite. Researchers should treat these dictionary entries as pointers to Blackstone and Bacon rather than self-contained explanations.
The term does not appear to have developed significantly beyond its classical civil law meaning in English or American jurisprudence. It is primarily a term of art in historical and scholarly discourse rather than active litigation vocabulary.
Jurisdictional Note
Jus legitimum is a civil law term adopted into English legal scholarship through Blackstone and the literature on uses. It does not have distinct statutory definitions in American jurisdictions and functions today primarily as a historical and comparative law concept rather than operative legal terminology.