Definition
Abjurare is a Latin term from medieval English law meaning to swear away, renounce, or abandon something by solemn oath. Most commonly encountered in the phrase abjurare regnum — to abjure the realm — which described the formal act by which a fugitive or convicted person swore under oath to leave England permanently, typically as an alternative to execution or further criminal punishment.
The term captures a specific procedural mechanism of the medieval common law: a binding oath of departure and exile, enforceable as a matter of law and honor, by which the crown resolved the status of persons who had fled to sanctuary or been convicted of serious offenses.
Common Language
Modern common usage (Wiktionary): To abjure means to solemnly renounce or retract a belief, claim, or course of action, especially under oath or public declaration.
Historical common usage (Webster's 1913): "To renounce upon oath; to forswear; to recant; to abandon." Webster's gives the example of abjuring a heresy or allegiance.
The common meaning captures the oath-based renunciation correctly, but misses the specifically territorial and penal character of the legal usage. In law, abjurare did not merely mean recanting a belief — it meant swearing to physically vacate a jurisdiction forever as a legally binding condition, with breach treated as a forfeiture of life or protection.
Common Confusion
Abjurare is sometimes read interchangeably with abjuration as a general act of renouncing allegiance or belief. In the legal sources, however, the term carries a precise procedural meaning tied to sanctuary law and criminal procedure — the sworn exile of a felon. It should not be conflated with later statutory uses of "abjuration" referring to oaths denying the legitimacy of a claimant to the throne (as in the English Abjuration Act 1701), which address political loyalty rather than criminal disposition.
Why It Matters in Research
Researchers encountering abjurare in medieval English legal records will almost always be in the domain of sanctuary law and criminal procedure, not oaths of political allegiance. The distinction matters for corpus navigation.
The term appears primarily in treatises of the thirteenth and fourteenth centuries — Bracton being the central source — in connection with the procedure by which a fugitive who had taken sanctuary could avoid trial and execution by confessing before the coroner and swearing to leave the realm forthwith. The convicted person would then be assigned a port, given a fixed time to reach it, and required to depart. Returning after such an oath was treated as forfeiture of life.
Researchers working in early English criminal law records should watch for abjurare regnum appearing alongside sanctuary procedure entries, coroners' rolls, and forest law records. Burrill's citation to Carta de Foresta c. 10 places the term also in the context of forest offenses, where the oath of exile operated as a sentencing alternative for convicted thieves and poachers.
The phrase vel patriam, comitatum — visible in the truncated Burrill entry — signals that abjuration could also apply at a sub-national level: swearing to leave a county or district rather than the entire realm. This variant is less discussed in secondary sources and easy to miss when reading primary records narrowly.
Because the practice of sanctuary abjuration was abolished by statute (James I, 1624), the term does not carry forward into modern common law doctrine. Later appearances of "abjure" or "abjuration" in legal texts operate in entirely different doctrinal contexts. Historical researchers must resist reading these later uses back onto medieval sources.
Historical Dictionary Support
Burrill's Law Dictionary provides the foundational treatment in the Law Mind corpus. His entry correctly traces abjurare to its components — ab (from) and jurare (to swear) — and connects it to the French forjurer, which operated analogously in the Norman legal tradition. Burrill cites Bracton directly (fol. 135b, 136a), which remains the authoritative medieval source on the procedure, and references Carta de Foresta c. 10 for the forest law application.
The entry is truncated in the available text, cutting off mid-citation in the passage dealing with the fate of convicted thieves — aut morti tradatur, aut regnum abjuret, vel patriam, comitatum — which translates roughly as "either he shall be handed over to death, or he shall abjure the realm, or the district, the county." This passage is important because it shows abjurare operating as one point on a sentencing continuum, not merely as a mercy alternative to execution in all cases.
Historical dictionaries generally agree on the oath-based, territorial character of the term. What they understandably do not address — given their era — is the archival distribution of the term across coroners' rolls and eyre records, or the degree to which abjuration practice varied by offense type. Researchers needing that granularity should move from dictionary sources to specialized scholarship on sanctuary law.
Jurisdictional Note
Abjurare as a legal term of art is specific to the medieval English common law tradition and its continental Norman antecedents. Scottish law had analogous but formally distinct procedures. The term has no operative meaning in modern common law jurisdictions, having been extinguished with the abolition of sanctuary.
Encyclopedia Cross-Reference
Law Mind Encyclopedia — Abjuration
Law Mind Encyclopedia — Sanctuary (Medieval Law)
Law Mind Encyclopedia — Coroner (Historical Office)