Definition
Latin. In old English practice, a defendant who is undefended or who makes no defense or plea — that is, one who stands before the court without answering, denying, or otherwise responding to the claim brought against them. The term describes both the condition (being without defense) and, by extension, the person in that condition. A matter left indefensus is one that has gone unanswered by way of pleading.
Why It Matters in Research
INDEFENSUS is a term of old English practice, most commonly encountered in medieval and early modern English legal records, plea rolls, and Latin-language procedural texts. Researchers working with Year Books, Plea Rolls, or early common law treatises such as Fleta will meet it in its procedural context — denoting a defendant's complete failure to appear or plead, which carried significant consequences including default judgment.
The term is of narrow application. It does not describe a defendant who appeared and lost on the merits, nor one who pleaded but poorly. It specifically captures the absence of any defense or plea whatsoever. This distinction matters when reading historical records: a judgment entered against an indefensus defendant is a default judgment in procedural substance, even if the record uses this Latin term rather than the later English vocabulary of "default."
Researchers should be aware that as English legal records and pleading transitioned from Latin to English (a process accelerated by the Pleading in English Act 1362 and completed more fully in later centuries), INDEFENSUS gave way to English equivalents. The term effectively disappears from living practice after the transition away from Law Latin, surviving only in historical legal literature and antiquarian dictionaries. It will not appear in modern case law in its Latin form.
The connection to default procedure is the most useful navigational thread. A researcher tracing the history of default judgment and the consequences of a defendant's failure to plead should treat INDEFENSUS as the Latin ancestor of that doctrine. The procedural outcome — the court proceeding without the defendant's participation — is the through-line.
Historical Dictionary Support
The historical sources are consistent and narrow. Burrill's Law Dictionary provides the most complete treatment, citing Fleta (lib. 2, c. 61, § 6) as the primary authority — a reliable citation to a genuine 13th-century Latin treatise on English law, giving the term a solid documentary anchor. Burrill breaks down the Latin components (in privative + defendere, to deny) and correctly characterizes the term as belonging to old English practice.
Black's Law Dictionary (both editions) tracks Burrill closely, defining INDEFENSUS as "undefended; undenied by pleading" and noting the defendant who makes no defense or plea. The second edition adds Blount as a secondary reference, which is consistent with the antiquarian provenance of the term. Rapalje & Lawrence reduces the entry to its core: "unanswered, in pleading" — accurate but spare, omitting the procedural context that gives the term its research utility.
None of the historical dictionaries elaborate on the consequences that attached to being indefensus, which is where the procedural significance actually lies. Researchers should not expect these entries to explain what happened to the indefensus defendant; that requires consulting the procedural sections of Fleta and comparable sources directly.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Default and Default Judgment (historical development); Pleading (history of English pleading practice)