Definition
A Latin phrase meaning "in kind" or "of the same kind." In legal usage, in genere describes an obligation, transfer, or restoration that may be satisfied by delivering any item of the same category, quantity, and quality as the thing originally owed — rather than the identical specific thing itself.
The phrase derives its legal force from a foundational distinction in Roman and civil law between two modes of fulfilling an obligation:
1. In genere: The duty is satisfied by tendering something generically equivalent — same type, same measure, same quality. The debtor need not return or deliver the exact item received. Fungible goods (grain, oil, money) are the classic examples. If I borrow a bushel of wheat, I owe you a bushel of wheat of like quality — not the precise kernels you handed me.
2. In specie: The obligation must be fulfilled by the return or delivery of the identical specific thing. A unique object, a particular parcel of land, or a named instrument cannot be substituted. Performance must be exact.
This distinction governs whether obligations are fungible or non-fungible, and shapes questions of risk of loss, substitution, and the nature of property transferred.
Common Confusion
IN GENERE vs. IN SPECIE: These two phrases form a complementary pair and are frequently encountered together. They are not synonyms and should not be treated as interchangeable. In genere tolerates substitution within a class; in specie demands identity. Researchers encountering one in a historical source should examine the surrounding text for the other. The distinction also surfaces in modern contexts as the difference between generic and specific obligations, or between fungible and non-fungible property — though those modern terms have largely displaced the Latin in common legal drafting.
IN GENERE vs. IN KIND: "In kind" is the standard English translation and functional equivalent in modern usage. However, "in kind" appears in modern tax, trust, and distribution contexts where the Latin phrase would not be used. The two are conceptually aligned but researchers should not assume that every modern "in kind" reference traces to the same civil law framework that in genere inhabits.
Why It Matters in Research
The primary research value of in genere lies in navigating civil law sources, Roman law commentaries, and historical treatises on obligations and property. It is unlikely to appear in common law pleadings or modern American statutory drafting, which have largely absorbed the concept into plain-language equivalents ("in kind," "fungible," "generic obligation"). However, it surfaces with some regularity in:
— Equity and trust contexts, where courts historically distinguished obligations to deliver specific assets from obligations to deliver equivalent value.
— Estate and distribution disputes, where executors satisfy bequests in genere (with equivalent assets) rather than in specie (with the exact named asset), and the validity of that substitution is contested.
— Civil law jurisdictions and their historical influence on Louisiana law, Quebec law, and Scots law sources within the corpus.
— Comparative law writing and any treatise drawing on Roman law foundations.
Researchers working in Black's Law Dictionary across editions will find the entry essentially identical between the first and second editions — a sign that the term had stabilized in meaning and was not subject to the doctrinal evolution that affected more contested terms. The Burrill entry adds a useful general gloss ("in general") as a secondary sense and preserves more of the civil law citation structure.
Watch for the phrase in corpus searches as a signal that the surrounding text is drawing on civil law rather than common law authority. It functions almost as a flag for the intellectual tradition of the source.
Historical Dictionary Support
All three source dictionaries converge on the same core definition: in kind, of the same kind, generically. Black's (both editions) and Burrill all cite Mackeldey's Roman Law (variously cited as Mackeld. Rom. Law § 161 or 1 Mackeld. Civ. Law, 152, § 148) as the authority, reflecting how directly this concept flows from Roman private law scholarship rather than English common law development. The consistency across sources is itself informative — this is a term that was not contested or evolving during the period these dictionaries were compiled.
Burrill adds a secondary gloss worth noting: "In general." This reflects a broader Latin usage of in genere that appears in legal maxims and philosophical writing, where it simply means "in the general case" or "as a general matter," as distinct from in specie meaning "in the particular case." This secondary sense occasionally surfaces in older judicial opinions and treatises as a phrase of logical organization rather than a term of obligation law. Researchers should read context carefully to determine which sense is operative.
None of the historical dictionaries address the term's application in trust administration or estate distribution — a gap that reflects the relative novelty of that application at the time of their compilation.
Jurisdictional Note
The in genere / in specie distinction retains its greatest doctrinal relevance in civil law jurisdictions, particularly Louisiana, where Roman law foundations remain active in private law. In common law jurisdictions, the underlying concept survives but is typically expressed in English through terms like "fungible" or "in kind," making the Latin phrase primarily a historical and interpretive marker rather than operative legal vocabulary.