Definition
A term from Roman civil law denoting a formal adjudication by which a court assigns ownership of property to one of the parties in a dispute. The adjudicatio operated as a mode of original acquisition: the judicial judgment itself confirmed or transferred title, rather than merely declaring a pre-existing right. It was most prominently associated with the three classical Roman partition actions — familiae herciscundae (partition of an inheritance among co-heirs), communi dividundo (partition of property held in common), and finium regundorum (settlement of boundaries between neighboring landowners). In each of these actions, the presiding judge held authority not merely to declare rights but to constitute them, vesting ownership by the act of judgment.
Common Confusion
ADJUDICATIO vs. ADJUDICATION: These are not interchangeable. Adjudication in modern common law usage refers broadly to any judicial resolution of a dispute. Adjudicatio is the narrower Roman civil law term, denoting specifically the vesting of property rights through judicial act. The confusion is compounded because Black's renders adjudicatio in English as "an adjudication," which can mislead a researcher into treating it as merely the Latin form of the same concept. The operative distinction is that adjudicatio was a substantive act of title-creation, not simply a declaratory ruling.
Core Elements
Three elements characterized adjudicatio in classical Roman law:
1. Partition context: Adjudicatio arose exclusively within the three partition actions. It was not a general mechanism of title transfer available in all litigation.
2. Constitutive judicial act: The judge's award did not merely recognize existing ownership but affirmatively created or reallocated property rights. This distinguishes adjudicatio from a purely declaratory judgment.
3. Legitimate mode of acquisition: Roman jurists classified adjudicatio among the recognized legal modes of acquiring property — alongside tradition, usucapion, and others — meaning title so acquired was legally complete and defensible.
Why It Matters in Research
Researchers encountering adjudicatio in primary sources should be alert to two things. First, the term appears almost exclusively in sources dealing with Roman law or in civil law jurisdictions influenced by the Roman tradition — it has no native common law equivalent and will not appear in English case reports as a term of art. Second, because Burrill's entry is the most detailed of the historical dictionaries on this point, it is the most useful starting point for tracing the Roman law context; Black's both first and second editions give a compressed version that omits the partition-action framework essential to understanding when and how adjudicatio operated.
For researchers working in Louisiana, Quebec, or other mixed civil law jurisdictions, adjudicatio concepts may surface in early sources discussing partition procedure, and the Roman framework described by Burrill provides the interpretive background. In purely common law research, the term's appearance signals a civil law source or a treatise writer drawing on Roman authority for comparative purposes.
Bouvier's entry for adjudicatio simply redirects to FORMULAE, signaling that Bouvier treated the term as inseparable from the Roman formulary procedure — useful context if the researcher is tracking how American treatise writers understood the Roman procedural system in the nineteenth century.
Historical Dictionary Support
Black's (both editions) and Burrill agree on the core definition: adjudicatio is a judicial act vesting property ownership, situated within Roman civil law. Burrill provides the most substantive treatment, specifying the three partition actions and characterizing adjudicatio as one of the legal modes of acquiring property — a detail absent from Black's. Black's citation to Mackeld's Roman Law § 204 is reliable and worth consulting directly for fuller doctrinal treatment. Bouvier's cross-reference to FORMULAE is less helpful in isolation but reflects the nineteenth-century tendency to embed adjudicatio within a broader discussion of Roman procedural forms rather than treating it as a freestanding concept. None of the historical dictionaries address the term's relevance to American civil law jurisdictions, a gap researchers should fill through period treatises on Louisiana or civilian procedure.
Jurisdictional Note
Adjudicatio is a Roman civil law term and has no direct application in common law jurisdictions. In American states with civilian heritage — particularly Louisiana — the underlying concept of partition by judicial award draws on this Roman foundation, though modern statutes and practice have superseded the classical terminology.