Definition
A justiciar was a high-ranking judicial and administrative officer of medieval England, operating primarily from the Norman Conquest through the thirteenth century. The term carries two related but distinct meanings in historical legal sources:
1. In its broader sense, any judicial member of the Aula Regis (the royal court of the Norman and early Plantagenet kings) — a person learned in the law who sat with the king's council and helped decide difficult legal questions. These officers were collectively called the king's justiciars.
2. In its narrower and more significant sense, the Chief Justiciar — the single presiding officer of the Aula Regis and, for extended periods, the effective regent of England in the king's absence. This officer combined what would now be understood as the functions of Lord Chief Justice and Prime Minister. The office in this form effectively ended with the reign of Henry III, after which its judicial and political functions were divided among more specialized institutions.
The term is sometimes spelled justiciary, particularly in Scottish legal usage, where the High Court of Justiciary survives as Scotland's supreme criminal court to the present day.
---
Common Language
Modern common usage (Wiktionary): One who administers justice; a high-ranking judicial officer of medieval England or Scotland; the Chief Justiciar as the highest political and judicial officer of twelfth- and thirteenth-century England; various equivalent medieval offices elsewhere in Europe.
Historical common usage (Webster's 1913): Same as justiciary.
The common-language definitions here are not misleading, but they are incomplete in a way that matters. Wiktionary lists the meanings sequentially without making clear that the Chief Justiciar was a fundamentally different institution from an ordinary royal justice — closer to a viceroy than to a judge. Researchers who treat "justiciar" as simply a medieval synonym for "judge" will underestimate the constitutional significance of the office and misread sources that discuss the justiciar's political and administrative authority.
---
Common Confusion
JUSTICIAR vs. JUSTICIARY vs. JUSTICE: These three terms share a root and are used interchangeably by some historical sources, but they are not equivalent. Justice is the surviving modern title for a judicial officer. Justiciary is both an alternate spelling of justiciar and, in Scottish law, an independent institutional term (the High Court of Justiciary). Justiciar, strictly used, refers to the historical English medieval office. Burrill distinguishes the terms explicitly, noting that the corresponding modern titles for the historical justiciars are "justice" and "chief justice" — but that equivalence is functional, not historical, and flattens the political dimensions of the original office.
JUSTICIAR vs. HIGH JUSTICIER: Black's 2nd edition adds a separate entry for high justicier in the context of old French and Canadian feudal law — a feudal lord who exercised high justice (capital jurisdiction) over tenants. This is a distinct concept from the English royal office, despite the similar terminology.
---
Why It Matters in Research
This is a term of purely historical significance in English law, with no modern English legal application outside of Scotland. Several research traps are worth noting.
First, the office evolved substantially across the period in which it existed. A source discussing the justiciar under William the Conqueror is describing something meaningfully different from a source discussing the Chief Justiciar under Henry II (when the office was at its peak political power) or under Henry III (when it was declining). Treating the term as stable across two centuries of Norman and Plantagenet history will produce anachronistic readings.
Second, Anderson's Dictionary of Law directs readers from JUSTICIAR to CHANCELLOR — a cross-reference that encodes a piece of constitutional history. Many functions that had belonged to the Aula Regis and its justiciars migrated to the Chancellor and the Chancery as English law became more institutionally differentiated. Researchers tracing the origins of equity jurisdiction or the development of the common law courts will find the relationship between these offices essential.
Third, the Rapalje & Lawrence entry includes the maxim justiciarii, tanquam justi in concreto — justices are so called as being just in the concrete — drawn from Coke on Littleton. This kind of etymological-philosophical gloss appears frequently in early modern English legal literature and reflects a mode of legal argument (deriving the content of an office from its name) that researchers must recognize as a rhetorical convention, not a historical description.
Fourth, in Scottish legal research, justiciary remains a living term. The High Court of Justiciary is Scotland's supreme criminal court, and its procedures, jurisdiction, and jurisprudence are distinct from English criminal courts. A researcher conflating Scottish justiciary with the historical English justiciar will confuse two entirely separate research threads.
---
Historical Dictionary Support
The five source dictionaries present a consistent picture of the term's meaning but vary in depth and in what they choose to emphasize.
Black's (1st ed.) gives the minimal definition: a judge or justice sitting in the Aula Regis, forming a court of appeal in difficult cases. The 2nd edition adds the High Justicier concept from French and Canadian feudal law, which the 1st edition omits entirely.
Burrill provides the most complete account, citing Blackstone's Commentaries (Book III) and Gilbert's Common Pleas, and explicitly noting that "chief justiciar" was the title for the presiding officer — and that modern equivalents are "justice" and "chief justice." Burrill also references Spelman, though the entry as reproduced here is truncated.
Rapalje & Lawrence emphasizes the office's origin with William the Conqueror and characterizes the justiciar as a lord chief justice. The entry also includes JUSTICIATUS (judicature; prerogative) and JUSTICIES (a writ directed to the sheriff) as adjacent terms — a reminder that the same root generated multiple distinct legal terms that appear in close proximity in historical sources and can be confused.
Anderson's entry is a bare cross-reference to CHANCELLOR, which is historically apt but gives the researcher no independent information about the justiciar itself.
What the historical dictionaries collectively underemphasize is the political and administrative dimension of the Chief Justiciar — the fact that officers like Ranulf de Glanvill and Hubert Walter functioned as de facto heads of government. Legal dictionaries naturally foreground the judicial aspects, but a researcher relying solely on these sources may not appreciate why the office matters for constitutional and administrative history, as distinct from strictly judicial history.
---
Jurisdictional Note
In Scottish law, justiciary is a current institutional term, not a historical one. The High Court of Justiciary exercises exclusive jurisdiction over the most serious criminal offenses in Scotland and serves as Scotland's final court of criminal appeal. This usage is independent of the historical English office and requires separate research attention. Researchers working in pre-Confederation Canadian legal history should also note the High Justicier concept in French feudal and seigneurial law, flagged in Black's 2nd edition.
---
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — Aula Regis; Common Law Courts (Historical Development); High Court of Justiciary (Scotland)
---