Definition
To be in arrear; to be behind in payment or performance of an obligation. A Latin-French (Law French) term appearing in medieval English legal texts to describe the condition of a tenant or obligor who has fallen behind on rents, services, or other dues owed to a lord or creditor.
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Common Confusion
*Aderere* can be visually mistaken for "adhere" in manuscript sources and early printed texts. The two words are unrelated in meaning. "Adhere" carries connotations of attachment or agreement; *aderere* denotes falling behind or defaulting. The similarity is orthographic only and arises from the conventions of Law French spelling. Researchers should also distinguish *aderere* from *arrere* (another Law French term for "in the rear" or "behind"), which appears in different contexts in feudal and military tenure.
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Why It Matters in Research
Researchers encounter *aderere* almost exclusively in medieval and early modern English legal sources — particularly in treatises on tenure, feudal obligation, and real property. Its appearance in Littleton's *Tenures* (the primary citation in Burrill) places it firmly within the vocabulary of feudal land law. A researcher reading Littleton or Coke upon Littleton should recognize the term as equivalent in function to modern concepts of default or arrears, without importing those modern meanings wholesale.
The term has no living legal use. Its significance is purely interpretive: when encountered in historical pleadings, conveyancing records, or tenure treatises, it signals that a party was behind on an obligation — most commonly rent or feudal service. Confusion with the English word "adhere" is a real hazard for researchers unfamiliar with Law French orthography.
Because Law French terms were often rendered inconsistently across manuscripts and printed editions, variant spellings may appear in archival sources. Search on root variants if a corpus search returns no results for the standard spelling.
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Historical Dictionary Support
Burrill's Law Dictionary is the primary authority here, and its entry is spare: *aderere* means "in arrear; behind," with a single citation to Littleton's *Tenures*, section 151. No other historical legal dictionaries in the Law Mind corpus appear to carry the term independently, reflecting its narrow textual footprint.
Burrill's citation to Littleton is the key anchor. Littleton's *Tenures* was the foundational English treatise on land tenure from the fifteenth century forward, and section 151 addresses obligations between lord and tenant. Coke's commentary on Littleton expanded the vocabulary of tenure law considerably, and researchers working that text should treat *aderere* as part of the same terminological family as *arrearages*, *distress*, and *seisin*.
The brevity of historical dictionary treatment reflects the term's function as technical vocabulary within a closed, superseded system of law rather than a term with broad doctrinal significance across common law development.
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Jurisdictional Note
*Aderere* is specific to English feudal law and has no application in civil law jurisdictions or in post-feudal common law systems. It does not appear in American legal sources except as a historical reference.
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