Definition
In law, a **user** is the actual exercise or enjoyment of a right or property. The term operates in two related but distinct senses:
1. **Exercise of a right or franchise.** User is the active enjoyment or exercise of a legal right, particularly a franchise or incorporeal hereditament. A franchise not exercised may be lost; evidence of user — actual, continuous, open exercise — is what establishes and maintains the right. Courts have distinguished between the mere possession of a right and its user: the latter requires actual practice, not theoretical entitlement.
2. **Enjoyment of property (civil law and equity).** In the civilian and equitable tradition, user refers to the beneficial enjoyment of property — the use one draws from it in fact. The Louisiana Civil Code captures this sense directly: the right of user entitles a person to make use of a thing owned by another to the extent necessary for personal wants and those of their family. This is a strictly limited real right, narrower than usufruct.
**Adverse user** is a recognized application: an adverse user exercises dominion over property as the true owner would — without permission, without acknowledging competing claims, and without limitation. Adverse user is the factual predicate for acquiring rights by prescription or defeating a franchise claim.
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Common Language
**Modern common usage (Wiktionary):** Someone who uses something — a person who operates software, a service, or a system. The dominant modern association is digital: a "user" is an account-holder or operator of a computer system or application.
**Historical common usage (Webster's 1913):** One who uses. Also, enjoyment of property — Mozley & Whiteley's usage note directly tracks the legal sense.
The gap between modern common meaning and legal meaning is significant and growing. A researcher encountering "user" in a contemporary context may instinctively reach for the software-and-accounts sense. In legal historical sources, "user" almost never means this. It means *enjoyment* or *exercise* — an active, factual relationship between a person and a right or property. The digital connotation is entirely absent from the legal corpus before the late twentieth century and remains a separate (largely statutory and regulatory) usage even today.
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Common Confusion
**User vs. use.** In equity and property law, "use" and "user" are related but not interchangeable. A *use* is the equitable interest itself — the right to benefit from property held by another. A *user* is the actual exercise of that interest or of any right. The Statute of Uses (1535) executed *uses* (converting equitable interests into legal title); it did not speak to *user* in the exercise sense. Conflating the two leads to misreading historical equity materials.
**User vs. usufruct.** In civilian systems, user (*droit d'usage*) is more restricted than usufruct. A usufructuary may enjoy the full fruits of a thing; a user may only take what is needed for personal and family wants. Bouvier and the Louisiana Civil Code both draw this line. Researchers working in mixed-jurisdiction or civil law materials should not treat the terms as equivalents.
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Recognized Forms
/SUBTYPES
**Adverse user.** Exercise of a right or property in a manner hostile to all other claims, without permission, as an owner would use their own property. The operative factual predicate for prescriptive acquisition and for defeating dormant franchise claims.
**Right of user (civil law).** A real right limiting the holder to personal and family enjoyment of another's property. Distinguished from usufruct by its narrower scope.
**User of a franchise.** Evidence that a franchise granted by sovereign authority has been actually exercised. Non-user may result in forfeiture; user establishes and maintains the right.
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Why It Matters in Research
The word "user" appears across the Law Mind corpus in at least three distinct legal registers — franchise law, equity and property, and civilian real rights — and researchers must identify which register a source is operating in before interpreting the term.
**Franchise law trap.** In nineteenth-century English and American cases on public franchises (roads, ferries, markets, utilities), "user" is the key evidentiary term. Decisions turn on whether there has been sufficient user — continuous, open, uninterrupted exercise — to establish or preserve a franchise right. These cases are indexed under "franchise" and "prescription" in the historical dictionaries, not always under "user" itself. Researchers must cross-search.
**Equity materials.** In trust and use materials, "user" describes the beneficiary's actual enjoyment of trust property. Because uses and trusts are treated by Black's as "different aspects of the same subject," a term appearing in pre-Statute of Uses materials under "user" may be tracking equitable enjoyment rather than legal title. Bouvier's brief entry ("The enjoyment of a thing") and its cross-reference to the Statute of Uses signal this register.
**Louisiana and civil law sources.** The civilian sense of user as a restricted real right appears in Louisiana materials and in comparative law discussions. This usage is absent from common law sources except by analogy. Researchers working across jurisdictions should not carry the common law prescription sense into civilian materials or vice versa.
**Modern regulatory gap.** Contemporary statutes and regulations — particularly in technology, data privacy, and consumer protection law — use "user" in the digital sense (account-holder, data subject, platform participant). This usage is entirely distinct from the historical legal sense and is not addressed in Black's, Black's 2nd, or Bouvier's. Researchers bridging historical and modern materials need to flag the semantic shift explicitly.
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Historical Dictionary Support
All three shelf sources agree on the core: user is actual exercise or enjoyment of a right or property. Black's (1st and 2nd) and Bouvier align without meaningful divergence on the basic definition.
Black's 2nd is the most useful of the three for practical research: it supplies the adverse user subtype with case citations and articulates the "asking no permission, disregarding all other claims" standard that courts applied to prescriptive acquisition. Black's 1st adds the civil law dimension via the Louisiana Civil Code, which no other historical source in the set addresses directly.
Bouvier is the thinnest entry — two sentences and a cross-reference to Uses and Trusts. It is useful only as a pointer; the substantive content is elsewhere in Bouvier's own corpus.
What the historical dictionaries collectively miss: the franchise-law application of user, which was extensively litigated in the nineteenth century, receives no dedicated treatment despite its importance. Researchers relying solely on the dictionary definitions will underestimate how significant "user" was as an operative term in franchise and prescriptive easement litigation. The case law must supplement the dictionary record here.
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Jurisdictional Note
The civil law sense of user as a restricted real right (personal enjoyment only, not full usufruct) applies in Louisiana and in mixed-jurisdiction systems drawing on the French and Spanish civilian tradition. Common law jurisdictions do not recognize this as a formal category, though equity courts sometimes borrowed the concept by analogy. Adverse user doctrine applies across common law jurisdictions but with varying prescriptive periods and hostility requirements set by state statute.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia — Uses and Trusts (for the equitable background and relationship between use and user); Adverse Possession and Prescription (for adverse user as a factual predicate); Franchises (for user as evidence of franchise exercise and non-user as grounds for forfeiture).
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