Definition
To deforce is to wrongfully withhold possession of land from a person who is lawfully entitled to it. The term describes the act of a person who has no right—or whose right has expired—continuing to exclude the true owner or a rightful possessor from the freehold. The wrong is not merely occupying land, but actively keeping out the person entitled to possession.
A secondary and distinct meaning exists in Scots law: to deforce is to resist an officer of the law by force in the execution of official duty. This sense has no direct counterpart in English common law and produces a separate offense under Scots law known as deforcement.
Common Language
Modern common usage (Wiktionary): To withhold land unlawfully from its true owner or from any other person who has a right to possession after lawfully entering and taking possession; also, to resist an officer of the law in execution of duty.
Historical common usage (Webster's 1913): To keep from the rightful owner; to withhold wrongfully the possession of, as of lands or a freehold.
The common and legal meanings align closely for the property sense, but the legal term carries a specific technical weight tied to the historical forms of real action in English law—it is not merely a synonym for trespass or wrongful occupation. The Scots law sense (resisting an officer) is invisible in the common definitions and would mislead a researcher who encountered the term in a Scottish legal source without knowing to distinguish the two jurisdictions.
Common Confusion
DEFORCE vs. DISSEISIN: These terms are often treated as interchangeable in older texts, but they are not identical. Disseisin traditionally implies an ouster—actively turning someone out of possession already held. Deforcement is broader and includes situations where the wrongdoer never ousted the claimant but simply refused to yield possession when the claimant's right accrued, such as a tenant holding over after a freehold right vested in another. Some historical authorities treated deforcement as a genus of which disseisin was one species.
DEFORCE vs. DISTRAIN: In early common law pleading, the terms were occasionally confused because both described situations where a party was "kept out" of something to which they were entitled. Distraint, however, concerns the seizure of goods as a remedy or pressure mechanism, not the wrongful withholding of seisin over land.
Recognized Forms
/SUBTYPES
English common law recognized deforcement as a broad category encompassing several wrongful withholdings of freehold possession, including abatement, intrusion, discontinuance, and disseisin. Bracton and subsequent commentators used deforcement as the umbrella term describing any unlawful detention of a freehold from a person entitled to it, regardless of how the wrongdoer came to be in possession.
The Scots law offense of deforcement is a distinct criminal wrong—resisting officers of law—and should be understood as a false cognate rather than a related form of the English property concept.
Why It Matters in Research
Researchers working in English common law materials from the thirteenth through nineteenth centuries will encounter "deforce" and "deforcement" in the context of the old real actions—writs of right, writs of entry, and related possessory proceedings. These actions were abolished in England by the Real Property Limitation Act 1833 and effectively rendered obsolete by the Common Law Procedure Act 1852, meaning the term largely disappears from English practice reports after the mid-nineteenth century. Encountering it in sources after that period generally signals either a historical discussion, a citation of older authority, or a Scots law context.
The Scots law sense is entirely separate and survives in Scottish criminal law long after the English property usage fades. Any Law Mind corpus materials touching Scottish practice—treatises, session papers, Bell's Dictionary—will use "deforce" and "deforcement" to mean resistance to officers, not wrongful land withholding. Conflating the two meanings in cross-jurisdictional research is a genuine trap.
Because deforcement was the generic term for the wrong that the old real actions were designed to remedy, understanding the word is prerequisite to reading Blackstone's discussion of real property procedure (Book III), Bracton's treatment of seisin, and any treatise on the forms of action. Researchers using those sources will find "deforcement" functioning almost as a term of art for the category of wrong, not a specific cause of action.
Burrill's is the most precise of the shelf dictionaries on this term, correctly flagging the Latin and Law French roots and cross-referencing the entry for Deforcement, which contains the fuller doctrinal treatment.
Historical Dictionary Support
All four shelf sources agree on the core English property definition—wrongful withholding of freehold possession—and all cite Blackstone's Commentaries (Book III, at 172) as the primary authority. This uniformity reflects that deforce had a settled, if narrow, meaning in English law and that by the time these dictionaries were compiled, the term was already largely historical.
Burrill adds the most context, flagging the Latin (deforciare) and Law French (deforcer) forms, which helps researchers identify the term in its variant spellings across medieval and early modern sources. Bouvier is the most concise and stops with the property definition, omitting the Scots law sense entirely—a gap researchers must supply from other sources. Both editions of Black's include the Scots law definition, distinguishing the dictionaries that were aimed at a wider common law audience from those focused on English practice.
None of the shelf sources elaborate on the relationship between deforcement and the specific writs designed to remedy it, or on the abolition of those actions in the nineteenth century. Researchers needing that procedural context should move from these dictionary entries to Blackstone directly and to historical treatments of the forms of real action.
Jurisdictional Note
In English law, the term is a product of the old real property actions and has no living procedural context following the abolition of those actions in the nineteenth century. In Scots law, deforcement survives as a distinct criminal offense meaning resistance to lawful authority, a usage that has no meaningful English common law parallel. American jurisdictions did not adopt the term in any standard form, and it appears only in historical discussions or in cases citing early English authority.