Definition
Effraction is the forcible breaking into a place — typically a building or enclosure — by the application of physical force. The term describes the act of breaking through a barrier (a door, wall, lock, or similar obstacle) as a means of unlawful entry. It is most commonly encountered in the law of burglary and theft, where the presence or absence of effraction may determine the grade of the offense or the availability of certain legal presumptions. In some civil law traditions, proof of effraction is relevant to insurance claims and liability disputes involving property crimes.
Common Language
Modern common usage (Wiktionary): Forcible burglary; also, in medical contexts, a bone fracture where the broken bone breaches the surface of the skin.
Historical common usage (Webster's 1913): Not separately listed; the term was treated as technical vocabulary confined to legal and surgical registers.
The legal meaning of effraction is narrower than the Wiktionary entry suggests. In law, effraction describes the physical act of breaking through a barrier to gain entry — it does not encompass burglary as a whole offense. The medical sense (a compound fracture) is entirely distinct and carries no legal significance. Researchers encountering the word in older legal texts should not assume the full offense of burglary is meant; effraction may refer only to the breaking element.
Common Confusion
Effraction is sometimes conflated with breaking and entering or burglary, but it is properly only one component — the forcible breach — not the complete offense. Burglary requires additional elements (typically unlawful entry and criminal intent); effraction describes the physical mechanism of breach alone. In civil law systems, particularly those influenced by French law, effraction functions as a term of art with specific evidentiary consequences that do not map cleanly onto common law burglary doctrine.
Why It Matters in Research
Effraction is an archaic term that appears regularly in older American case law, colonial-era statutes, and civil law materials but has largely disappeared from modern legal usage. Researchers working in pre-twentieth-century sources — particularly in Louisiana, Quebec-influenced jurisdictions, or materials with French or Spanish civil law heritage — will encounter it with meaningful frequency.
Two research traps to flag: First, historical sources use effraction to distinguish aggravated or forcible entry from simple trespass or entry through an open passage, which affects how offenses are graded. A charge that specifies effraction signals more serious treatment than mere unlawful entry. Second, in insurance law history, policy language conditioned coverage on whether theft occurred "with effraction" — meaning visible, forcible breach — as opposed to entry by stealth or deception. Researchers analyzing historical insurance disputes must understand effraction as a coverage trigger, not merely a descriptive term.
The term also appears in civilian inheritance and tutorship materials, where breaking seals on an estate (rupture de scellés) is sometimes rendered in English translations as effraction. Context is essential.
WHY IT MATTERS IN RESEARCH connections: Look for this term alongside housebreaking, burglary, and forcible entry in index searches of pre-1900 digests. It will rarely appear in post-1950 American sources except in historical or comparative law discussions.
Historical Dictionary Support
Black's Law Dictionary and Bouvier's Law Dictionary agree precisely: effraction is "a breach made by the use of force." Neither source elaborates further, which is itself informative — both treat the term as sufficiently self-evident to require no qualification. This brevity reflects the term's status as a technical descriptor rather than a substantive legal concept with contested elements.
What the historical sources miss: neither Black's nor Bouvier's addresses the civil law evidentiary function of effraction, its role in insurance coverage disputes, or the distinction between effraction and other modes of unlawful entry. Researchers relying solely on these definitions will have the core meaning but may not appreciate why the presence or absence of effraction mattered procedurally and commercially in historical practice.
Jurisdictional Note
Effraction carries the most doctrinal weight in Louisiana and in materials derived from French civil law, where forcible breaking carried specific legal consequences distinct from those in common law jurisdictions. In common law states, the concept is absorbed into breaking and entering doctrine and the term itself is largely absent from modern statutes and opinions.