Definition
Trespass is a term with three layered meanings that have narrowed progressively over time — from a broad catch-all for civil wrongs, to a specific common law form of action, to its modern usage as an unauthorized entry onto another's property. Researchers should not assume a single consistent meaning across historical sources.
1. Broadest sense (archaic): Any misfeasance or wrongful act by which another person is injured or damaged. In this sense, trespass was nearly synonymous with "wrong" or "tort." Blackstone uses it this way, and Anderson's Dictionary notes it could encompass offenses against the law of nature, society, or the state.
2. Common law form of action: A civil action to recover damages for an injury done with force — either actual or implied by law — to a person, to personal property (chattels), or to real property. This is the technical procedural meaning. The common law writ system gave rise to distinct subtypes distinguished by Latin descriptors (see Recognized Forms/Subtypes below). This sense is now largely obsolete in jurisdictions that have abolished common law forms of pleading.
3. Modern civil tort: An intentional, unauthorized entry onto the real property of another, causing damage however small. No proof of actual harm is required — the intrusion itself is actionable. This is the primary meaning in contemporary civil practice.
4. Criminal trespass: Entry onto another's land or structure without authorization, defined by statute in all U.S. jurisdictions. Elements and gradations (misdemeanor vs. felony) vary significantly by state.
Common Language
Modern common usage (Wiktionary): An intentional interference with another's property or person; also used loosely to mean "sin" in religious and archaic English.
Historical common usage (Webster's 1913): To pass beyond a limit or boundary; to enter unlawfully upon another's land; to go too far or impose on another's time or patience; to commit any offense.
The gap between common and legal usage is real but runs in both directions. Ordinary speakers use "trespass" primarily to mean unauthorized entry onto land — which aligns with the modern civil and criminal tort meaning. But popular usage misses the historical legal breadth: trespass once covered personal injuries, theft of goods, and much of what we now call tort law. Conversely, religious usage ("forgive us our trespasses") preserves the archaic broad sense that legal usage has largely abandoned.
Common Confusion
Three modern terms are frequently conflated with trespass or with each other:
Trespass to land vs. trespass to chattels: Both are intentional torts, but trespass to land requires only unauthorized entry (no actual damage needed), while trespass to chattels requires proof of actual harm or dispossession of personal property. The common law writ system kept these distinct; modern pleading sometimes blurs them.
Trespass vs. nuisance: Trespass involves a direct physical intrusion; nuisance involves indirect interference with use and enjoyment of property (noise, odors, recurring harm). Researchers will find historical sources using "trespass" expansively in ways that modern courts would analyze as nuisance.
Civil trespass vs. criminal trespass: The same act may constitute both a civil tort and a criminal offense, but the elements, defenses, and required mental states differ. Criminal trespass statutes typically require knowledge of lack of permission; civil trespass does not require intent to trespass — only intent to enter.
Recognized Forms
/SUBTYPES
The common law writ of trespass spawned formally named subtypes, which appear extensively in historical legal sources:
Trespass vi et armis ("with force and arms"): The root form — a direct, forcible injury to person or property. The basis for modern battery and assault claims.
Trespass de bonis asportatis ("for goods carried away"): Wrongful taking of personal property; the precursor to modern conversion and theft causes of action.
Trespass quare clausum fregit ("wherefore he broke the close"): Unauthorized entry onto enclosed land. The precursor to modern trespass to land.
Trespass on the case (or "case"): A derivative form for indirect injuries where the connection to force was attenuated. This writ eventually broke off entirely and became the foundation for negligence, nuisance, and fraud actions.
These Latin forms appear throughout Burrill, Rapalje & Lawrence, and Blackstone, and researchers working in pre-twentieth-century sources must be able to identify which subtype is at issue.
Why It Matters in Research
Historical source traps: The word "trespass" in sources from the seventeenth through nineteenth centuries frequently does not mean unauthorized land entry. It may refer to the entire law of civil wrongs, to a specific writ, or to any of the Latin subtypes. Reading Blackstone or Bouvier without this framework produces systematic misreading.
The trespass/case split is essential: Much of the historical debate in common law tort development turns on whether a claim sounded in trespass (direct force required) or in case (indirect harm). The distinction determined which writ to use and, consequently, whether a plaintiff could recover. Modern researchers tracing the development of negligence law will find this procedural history unavoidable.
Criminal trespass statutes are not codified common law: Modern criminal trespass is largely a statutory creature that varies substantially by jurisdiction — elements, mental state requirements, aggravating factors, and penalties differ widely. Do not assume that criminal trespass doctrine in one state maps onto another.
Corpus connections: Trespass to chattels has experienced a significant modern revival in the context of unauthorized computer access and digital property claims — a development the historical dictionaries obviously do not anticipate. Researchers working on technology or cybersecurity law should treat the traditional chattel trespass doctrine as a live and evolving area.
Historical Dictionary Support
The historical dictionaries converge on the broad definition — "any misfeasance whereby another is injuriously treated" — and trace it to Blackstone's Commentaries (Book III, p. 208). Black's (both editions) and Bouvier reproduce this formulation nearly verbatim. The agreement on this starting point is strong.
Where sources diverge is in how far they follow the narrowing. Burrill is procedurally oriented, treating trespass primarily as a form of action defined by the writ. Rapalje & Lawrence is more taxonomic, providing sub-definitions including the "continuing trespass" concept (encroachment where a structure permanently overhangs a neighbor's property). Anderson is the broadest, preserving the quasi-criminal and natural law senses of the term.
Bouvier is the most useful for the writ system's details, covering justification and privilege defenses (self-defense, public necessity, license) at length. None of the historical dictionaries adequately address trespass to chattels as a distinct modern tort doctrine — they fold it into the general writ framework, which obscures how the doctrine has developed independently in modern civil practice.
Jurisdictional Note
Civil trespass is broadly consistent across common law jurisdictions, though damages rules (nominal damages, actual harm requirements for chattels) vary by state. Criminal trespass diverges sharply: some states require posted notice or prior warning before criminal liability attaches; others criminalize entry alone. The Model Penal Code approach (§ 221.2) has influenced but not uniformly displaced state-specific statutes.
Encyclopedia Cross-Reference
Trespass to Land — torts_105, The Law Mind Torts & Personal Injury Encyclopedia
Trespass to Chattels — torts_106, The Law Mind Torts & Personal Injury Encyclopedia
Criminal Trespass — criminal_67, The Law Mind Criminal Law Encyclopedia