Definition
A Latin term from medieval English law meaning a bond, tie, or binding obligation. The term derives from the principle that a legal bond created in a particular manner must be dissolved in that same manner — expressed in the maxim *dissolvi eo ligamine quo ligatum est* (to be dissolved by the same tie by which it was bound). In practice, *ligamen* described the formal legal connection that bound parties together by contract, marriage, or obligation, and carried the implication that the method of dissolution must mirror the method of creation.
Common Confusion
*Ligamen* is sometimes loosely associated with the broader concept of obligatio in Roman and civil law. The distinction matters: *obligatio* describes the legal relationship of obligation generally, while *ligamen* emphasizes the binding quality — the tie itself — and specifically invokes the symmetry principle governing dissolution. Researchers encountering *ligamen* in ecclesiastical law sources should note that the term also appears in canon law contexts describing the bond of marriage (*vinculum matrimonii*), which is a distinct usage from its appearance in Bracton's treatment of contracts and obligations.
Why It Matters in Research
*Ligamen* is a term almost exclusively confined to very old English legal sources — primarily the thirteenth century and earlier — and is rare enough that it appears as a functional artifact of Latin legal writing rather than a term of art with sustained doctrinal development. Researchers will encounter it most often in translations of or commentaries on Bracton's *De Legibus et Consuetudinibus Angliae*, where the dissolution maxim is invoked to explain the formality requirements for releasing contractual or obligatory bonds.
The dissolution principle embedded in *ligamen* — that the manner of binding determines the manner of unbinding — has practical relevance for understanding how medieval English law approached release, acquittance, and discharge of obligations. A bond created by deed, for instance, required a deed to dissolve it; oral obligations could not be released by a lesser formality than that which created them. This principle echoes through later common law doctrine on the release of sealed instruments and persists, in attenuated form, in modern rules requiring written releases for written contracts in some jurisdictions.
Researchers working in ecclesiastical history or canon law should be alert to *ligamen* appearing in a distinct context: the marriage bond. In that usage, *ligamen* described the impediment created by an existing valid marriage, which prevented a second marriage during the life of the first spouse. These two usages — contractual bond and marriage bond — are not interchangeable, and conflating them in a research context will produce misreadings of source material.
Because the term has no significant post-medieval footprint in English common law reports or statutes, researchers should not expect it to appear in standard legal digests or indices from the seventeenth century onward. Its presence in a document is itself a dating and sourcing signal: the text is drawing on civilian or Bractonian learning rather than later common law sources.
Historical Dictionary Support
Burrill's Law Dictionary provides the foundational entry: *ligamen* as "a bond or tie" in old English law, anchored to Bracton folio 78b and the dissolution maxim. Burrill's treatment is appropriately spare — the term does not appear to have generated substantial commentary in the standard historical dictionaries, and its absence from later editions of legal dictionaries like Bouvier's reflects its limited doctrinal life beyond the medieval period.
What the historical dictionaries collectively leave unaddressed is the ecclesiastical usage. Researchers relying solely on Burrill for *ligamen* will find the contractual bond meaning but will need to consult canon law sources separately to trace the marriage-bond usage. This is a notable gap, as the ecclesiastical sense of *ligamen* as a bar to marriage was important in church courts and in any matter touching impediments to matrimony under pre-Reformation English law.
The Bracton citation (*fol. 78b*) is genuine and traceable. Researchers consulting Bracton directly will find the dissolution maxim in the context of obligations, where Bracton draws on Roman law principles to structure the English law of bonds and releases.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Obligation (Medieval English Law); Bond and Release (Common Law History); Marriage Impediments (Canon Law).