Definition
Latin. "On both sides." A phrase used in legal proceedings and documents to indicate that something applies to, involves, or binds both parties — not unilaterally, but mutually and reciprocally. Where a motion, order, hearing, or obligation is ex utraque parte, all parties are present, participating, or affected, as opposed to a proceeding conducted at the instance of one side alone.
The phrase appears most commonly as a descriptive marker in older reports and pleadings to confirm that a matter was heard or decided with both parties before the court.
Common Language
This is pure Latin legal terminology with no meaningful life in ordinary English. The component words — ex (from/out of), utraque (each/both), parte (part/side) — are recognizable to Latin readers, but the phrase as a unit is exclusive to legal and formal contexts. The COMMON LANGUAGE section is omitted accordingly.
Common Confusion
Ex utraque parte is frequently encountered alongside its functional opposite, ex parte, and the distinction is critical. Ex parte means "from one side only" — a proceeding or order obtained without notice to or participation by the opposing party. Ex utraque parte means the reverse: both sides are present or the matter applies to both. Researchers working through historical reports must be alert to which phrase appears, as the two look similar at a glance and describe fundamentally different procedural postures. A ruling issued ex parte carries notice and constitutional due process implications that an ex utraque parte ruling does not.
Why It Matters in Research
The phrase is rare in modern legal writing and has largely been replaced by plain-English equivalents such as "bilateral," "inter partes," or simply "on notice to all parties." Researchers encountering ex utraque parte will almost always be working in historical materials — English Year Books, early chancery reports, or common law pleading texts.
Three navigational points matter:
First, the phrase functions diagnostically. When an early reporter uses ex utraque parte, it signals that a ruling or argument was not unilateral. This is directly relevant when tracing the procedural history of a doctrine and assessing whether a precedent was set after adversarial argument or in a default or ex parte context.
Second, the citation appearing in all three source dictionaries — Dyer — refers to the reports of Sir James Dyer, Chief Justice of the Common Pleas, covering cases from the mid-sixteenth century. Researchers tracing this phrase into primary sources should consult Dyer's Reports accordingly. The slight variation in page references across dictionary editions (126b, 126 6, and 126 0) likely reflects transcription inconsistency across editions rather than different cases; researchers should verify directly in the Dyer Reports.
Third, the phrase has no modern statutory or regulatory use. If it appears in a contemporary document, treat it as deliberate archaism or direct quotation from historical source material.
The encyclopedia entries linked below address the closely related ex parte concept across several substantive law contexts. Understanding ex utraque parte sharpens the contrast with ex parte procedure, which remains active and consequential in modern emergency orders, trade secret seizures, and constitutional litigation against state officers.
Historical Dictionary Support
All three source dictionaries — Black's (1st Ed.), Black's (2nd Ed.), and Burrill — define the phrase identically: "On both sides." The only variation among them is minor inconsistency in transcribing the Dyer page reference, a known artifact of nineteenth- and early-twentieth-century legal dictionary reproduction practices. None of the three sources elaborates beyond the bare translation. This unanimity reflects the phrase's settled, uncontested meaning rather than any editorial shortcut.
What the historical dictionaries do not provide is context for how the phrase was used in practice — whether it modified orders, arguments, hearings, or instruments, and what procedural consequences followed. That contextual dimension must be reconstructed through the primary sources, particularly Dyer's Reports and contemporaneous pleading manuals.
Encyclopedia Cross-Reference
The Law Mind Constitutional Law Encyclopedia: Ex parte Young — The Fiction That Permits Suits Against State Officers (constitutional_42)
The Law Mind Family Law Encyclopedia: Domestic Violence — Emergency / Ex Parte Orders of Protection (family_171)
The Law Mind Intellectual Property Encyclopedia: The Defend Trade Secrets Act — Federal Civil Action and Ex Parte Seizure (ip_94)
These entries address the ex parte doctrine in operative modern law. Reading them alongside this entry clarifies the procedural and constitutional weight that attaches to the distinction between unilateral and bilateral proceedings — the core distinction ex utraque parte marks.