Definition
A Latin term from Roman civil law meaning a dilatory exception — a procedural defense that does not defeat a plaintiff's claim outright but delays or temporarily bars the action. Also called *exceptio temporalis* (temporary exception), it operated by suspending proceedings until a specified condition was met or a period of time had passed. The classic example is an agreement between parties not to sue within a certain time, such as five years; if suit was brought before that period elapsed, the defendant could raise this exception to defeat the action for the time being. Once the agreed period expired, the plaintiff's right to proceed revived fully.
The exceptio dilatoria is distinguished from the *exceptio peremptoria* (peremptory exception), which extinguished the right of action permanently. The dilatory exception merely postponed — it harmed for a time (*quæ ad tempus nocet*) rather than destroyed.
In common law terminology, the closest functional equivalent is the dilatory plea, a pre-trial defense that challenges the court's authority, the plaintiff's capacity, or the timeliness of the action without contesting the underlying merits.
Common Confusion
EXCEPTIO DILATORIA vs. EXCEPTIO PEREMPTORIA: The two are often mentioned together and are easy to conflate. A peremptory exception permanently bars the action — it kills the claim. A dilatory exception only delays it. The distinction matters because a party who successfully raised a dilatory exception had not forfeited their substantive rights on the merits; the plaintiff simply had to wait. Researchers encountering these terms in Roman law sources, canon law texts, or early common law treatises should determine which type of exception is at issue before drawing conclusions about the outcome of the dispute.
Why It Matters in Research
This term appears almost exclusively in pre-modern legal materials: Roman law texts, the Corpus Juris Civilis (Institutes and Digest), canon law sources, and early English treatises influenced by civil law learning. Researchers will encounter it in works on Roman procedure, equity practice, and ecclesiastical courts, where civil law terminology persisted long after it disappeared from common law pleading.
**Traps in historical sources.** The term *exceptio* in Roman law does not map cleanly onto any single modern procedural category. Depending on context, an *exceptio* might resemble a modern affirmative defense, a motion to dismiss, a plea in abatement, or a statute of limitations defense. Do not assume that every *exceptio* functions identically, and do not translate *exceptio dilatoria* as simply "objection" or "defense" without capturing the temporal, non-merits character of the dilatory form.
**Common law transition.** Burrill notes the common law parallel as the dilatory plea — a category that included pleas to the jurisdiction, pleas in abatement, and similar pre-merits challenges. When reading treatises from the seventeenth and eighteenth centuries, authors trained in civil law often used Latin terminology interchangeably with English procedural vocabulary. Encountering *exceptio dilatoria* in an English equity or admiralty source does not mean the author is citing Roman law directly; it may simply reflect the cosmopolitan legal education of the period.
**Corpus connections.** Researchers following citations in Burrill to the Institutes (4.13.10) and the Digest (44.1.2.4; 44.1.3) will find the primary source material for the Roman law doctrine. Canon law commentators elaborated the exceptio dilatoria extensively in the context of ecclesiastical court procedure, and that literature bridges the gap between Roman sources and early modern English practice in courts with civilian jurisdiction.
Historical Dictionary Support
Burrill provides the most complete entry, closely tracking the Roman law sources and quoting the operative Latin phrasing (*quæ differt actionem*; *quæ ad tempus nocet et temporis dilationem tribuit*). The example given — an agreement not to sue for five years — is drawn directly from Justinian's Institutes. Burrill also makes the common law translation explicit, identifying the dilatory plea as the functional equivalent.
Black's entry is fragmentary in the available text but is consistent with Burrill's framing, treating the term as a civil law term of art for a temporary, non-merits procedural bar.
Both sources agree on the essential distinction: the dilatory exception delayed rather than destroyed. Neither source engages with the later canon law elaboration of the doctrine or its use in admiralty and ecclesiastical proceedings in England — a gap researchers should be aware of when working in those court systems.
Jurisdictional Note
The exceptio dilatoria is a creature of civil law systems. It has no direct surviving counterpart in modern American or English common law by that name, though the functional concept persists in statutes of limitations, contractual no-suit agreements, and pleas in abatement. It remains relevant in jurisdictions with mixed civil and common law traditions and in any research touching Roman, canon, or early modern admiralty law.