Definition
Latin: to consent; to think together with another; to be of the same mind; to agree. In classical Roman law and the legal Latin tradition, consentire denotes the act of mutual agreement — specifically the convergence of minds that renders a legal act, contract, or transaction valid. The term is most often encountered in Law Latin legal maxims and in historical legal texts that treat consent as a foundational requirement for binding obligation.
The term is not a distinct legal doctrine in modern common law but functions as the root concept underlying consent as a legal element across contract, tort, criminal, and family law. Understanding consentire means understanding what historical sources meant when they said consent must be real, free, and knowing — not merely formal or coerced.
Common Language
Modern common usage (Wiktionary): No English entry. Latin term not in general modern use.
Historical common usage (Webster's 1913): Not listed. The term remained legal and ecclesiastical Latin throughout its English reception.
Editorial note: Because consentire never crossed into ordinary English as a standalone word, the common language gap is not between legal and popular meaning — it is between the Latin source term and the English derivatives (consent, consensus, assent) that absorbed its legal content. Researchers encountering consentire in historical texts should not assume it carries the narrower or broader meanings that "consent" has acquired in specific modern legal contexts.
Common Confusion
Consentire is sometimes read as synonymous with consensus, but the terms carry different emphases in Roman law sources. Consentire emphasizes the act or process of agreeing — the meeting of minds as an event. Consensus emphasizes the resulting state of agreement. In contract formation analysis drawn from civilian sources, this distinction can matter: a text invoking consentire may be addressing the moment or conditions of agreement, while consensus addresses the agreement itself as a legal fact.
Researchers should also avoid conflating consentire with mere acquiescence. Historical sources are explicit: passive failure to object does not satisfy consentire. Agreement must be active and knowing.
Why It Matters in Research
The primary research value of consentire is as a key to reading legal maxims and historical treatises in which consent is analyzed as a positive requirement for validity. Several recurring maxims turn on the precise meaning of consentire:
Non consentit qui errat — He who errs does not consent — appears in Bracton and recurs in later common law and equity discussions of mistake in contract and marriage. When a historical source cites this maxim, it is invoking the Roman law principle that genuine consentire requires accurate understanding of what is being agreed to. Researchers working on the history of mistake doctrine, fraud, or undue influence will encounter this maxim as a justificatory anchor.
Burrill's entry also flags the principle that consent obtained by meditated imposition, circumvention, surprise, or undue influence is to be treated as a delusion — meaning not true consentire at all. This framing appears in early equity cases on fraud and in marriage law cases where the validity of a union was contested. The word "delusion" in this context is a term of art meaning a consent so defective as to be void or voidable, not merely imperfect.
For corpus researchers, consentire will appear almost exclusively in pre-nineteenth century texts, Bracton-derived discussions, ecclesiastical court records, and civil law commentaries. It rarely appears in American primary sources except when authors are deliberately invoking Roman or canon law authority. Its presence is therefore a reliable signal that a source is engaging with foundational jurisprudence rather than settled common law doctrine.
Researchers tracing the development of consent as a legal standard — in contract, criminal law, or tort — should use consentire as a backward-reaching anchor term. The English doctrine of consent was built on this Latin substrate, and historical sources will use the Latin term to signal continuity with that foundation.
Historical Dictionary Support
Burrill's Law Dictionary provides the core entry: consentire derives from con (together) and sentire (to think), and means to consent, to think with another, to be of the same mind. Burrill cites Bracton (fol. 44) for the maxim non consentit qui errat, and the entry continues to note that consent obtained by meditated imposition, circumvention, surprise, or undue influence vitiates the agreement.
No other source dictionaries in the Law Mind shelf cover this term directly. The entry in Burrill is brief but substantively important: it locates the term within Bracton's treatment of consent and signals its connection to the vitiating factors that equity and common law later systematized. The Bracton citation is genuine and traceable — Bracton's De Legibus et Consuetudinibus Angliae, folio 44, addresses the conditions of valid consent in the context of marriage and contract.
What historical dictionaries do not capture: the downstream development of consentire's principles into the modern consent framework across multiple bodies of law. Burrill records the Latin source; he does not trace how non consentit qui errat became operative in nineteenth- and twentieth-century mistake and fraud doctrine. That analytical work falls to the researcher.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — Consent; Mistake (Contract Law); Undue Influence; Fraud in the Inducement