Definition
COMMUNIA is a Latin term from old English law with two related but distinct uses.
1. As a plural noun (communia, plural of communis): Things held in common by all — res communes — by their nature incapable of private ownership. Classic examples include running water, the air, the sea, and the seashore. These were not public property in the sense of state ownership, but resources open to all by natural law.
2. As a substantive noun (communia, from communis or, per Bracton, from cum + una, "together with others"): The right of common itself — the legal entitlement shared among a group of persons to use land or resources belonging to another. In this sense, communia appears as the root of specific common-right terms: communia pasturae (common of pasture), communia turbaria (common of turbary, i.e., the right to cut turf or peat), and communia piscaria (common of piscary, i.e., the right to fish).
Both uses share the same conceptual core: resources or rights that belong not to a single private holder but are shared, whether by all of humanity or by a defined group of commoners.
Common Language
Modern common usage (Wiktionary): Communia has no standard entry in modern English usage. The word survives in English primarily in academic and legal-historical contexts.
Historical common usage (Webster's 1913): Not independently defined. The root communis appears in Webster's as "belonging to or shared by two or more; common; public," tracking the ordinary Latin meaning.
The legal term carries a precision that the ordinary root does not. In legal usage, communia describes a recognized juridical category with consequences for rights, remedies, and the alienability of property — not merely an adjective meaning "shared."
Recognized Forms
/SUBTYPES
Three principal compound forms appear in the historical sources:
— Communia pasturae: Common of pasture. The right to graze animals on another's land, typically appurtenant to a holding in the same manor.
— Communia turbaria: Common of turbary. The right to cut turf or peat from another's land for fuel, closely regulated in extent.
— Communia piscaria: Common of piscary. The right to fish in waters belonging to another.
These are not merely descriptive labels; each was a distinct legal interest with its own rules regarding attachment, appurtenancy, and remedy at common law.
Why It Matters in Research
Researchers encounter communia in two different analytical contexts, and conflating them produces serious misreadings.
First, when communia means res communes — things common to all — it signals a natural-law framework derived from Roman law and transmitted through Bracton. This usage places the passage in a theoretical or philosophical register, not a practical conveyancing one. The folio references in Black's (fol. 7b) and Burrill's (fol. 222) point to different parts of Bracton's De Legibus, so folio location is a useful signal for which sense is intended.
Second, when communia introduces a compound term (communia pasturae, turbaria, piscaria), the document is in the practical register of manorial and agrarian law. Here the researcher needs the companion entries for each type of common, as well as the procedural vehicle — typically an action of nuisance or the writ de admensuratione pasturae — for enforcement.
The shift from Latin pleading and treatise writing to English legal writing means communia largely disappears from primary sources after the seventeenth century. When it appears in records from that period forward, it is almost always a quotation from or citation to Bracton, Fleta, or the Registrum Brevium, not a living term of practice. Treat it as a signal to consult the underlying medieval source rather than as operative language in its own right.
Burrill's entry is more complete than either edition of Black's for the compound forms and provides the more useful starting point for identifying the type of common at issue.
Historical Dictionary Support
All three source dictionaries agree on the core meaning of communia as res communes, and all cite Bracton as the authority. Black's (both editions) confine themselves to this sense. Burrill's goes significantly further, providing the derivation controversy (communis versus cum + una per Bracton himself), the compound forms with their specific folio and source references (Bracton, Fleta, and the Registrum Originale), and treating communia both as a plural noun and as a substantive root.
The folio discrepancy between Black's 1st edition (fol. 76) and Black's 2nd edition (fol. 7b) for the res communes definition is likely a typographical variation rather than a substantive disagreement; the 2nd edition's fol. 7b is generally considered the more accurate citation.
What the historical dictionaries do not address: the relationship between communia as res communes and the Roman law categories (res publicae, res nullius, res universitatis) that Bracton is drawing on. Researchers working on the theoretical framework, particularly for environmental or public-trust questions, will need to go behind the dictionary sources to Bracton's text directly and to Roman law scholarship.
Jurisdictional Note
Communia as a term of art is confined to the English common-law tradition and its derivatives. American law inherited the doctrine of common rights and the res communes concept but shed the Latin terminology early. In modern U.S. research, the functional descendant appears in public trust doctrine and navigable-waters law, not under this term.