Definition
In the civil law, a forger or counterfeiter — specifically, a person who falsifies or corrupts something of legal significance, most commonly currency. The term appears in Roman law to denote those who debased or fabricated coins, captured in the phrase adulteratores monetae (counterfeiters of money). It is a Latin term of art drawn directly from the Digest and has no meaningful modern common-law equivalent; contemporary legal systems address the same conduct under forgery, counterfeiting, and fraud statutes rather than through this label.
Common Language
Modern common usage (Wiktionary): One who or that which adulterates, or harms the purity of, something.
Historical common usage (Webster's 1913): One who adulterates or corrupts.
The common meaning is broad and neutral — it captures anyone who degrades or contaminates any substance or thing. The legal meaning is narrower and more specific: in civil law sources, adulterator is a term of criminal classification tied to forgery and counterfeiting, not general corruption or contamination. A food manufacturer who dilutes a product is an adulterator in the common sense; in classical legal usage, that person would not ordinarily be called an adulterator at all.
Common Confusion
ADULTERATOR / ADULTERER: The visual and phonetic similarity creates a genuine conflation risk in older manuscripts and printed texts where typeface and spelling were inconsistent. Adulterer refers to a person who commits adultery (the marital offense); adulterator refers to a forger or counterfeiter. The two concepts share no legal relationship. In handwritten or early printed sources, the truncated forms adulter- or adultera- require context to disambiguate.
ADULTERATOR / ADULTERATION: In modern regulatory law, adulteration is a well-developed concept governing food, drug, and product safety. A person who adulterates goods in the regulatory sense may colloquially be called an adulterator, but that usage is entirely distinct from the civil law term and carries no Roman law baggage. Do not import the regulatory meaning into historical legal sources, or vice versa.
Why It Matters in Research
ADULTERATOR is a historical term with no living presence in modern statutory or case law. Researchers encountering it should treat it as a civil law citation marker — its appearance almost invariably signals a reference to Roman law sources, particularly the Digest, rather than to any common-law authority.
The primary research trap is anachronistic reading. A researcher scanning 18th- or 19th-century legal dictionaries or treatises that invoke adulterator may assume the term carries the broad common-language sense (anyone who corrupts or debases anything). In legal sources, it is narrower: a person who falsifies instruments of legal or monetary value, especially coinage.
Corpus navigation note: In the Law Mind corpus, adulterator will appear almost exclusively in civil law dictionaries and Roman law commentaries, not in common-law treatises or case reporters. If the term surfaces in an early American or English document, it is almost certainly a direct borrowing from a civil law or ecclesiastical source rather than an indigenous common-law usage. Cross-check any such occurrence against the underlying Latin source before drawing conclusions about the author's intended meaning.
Researchers pursuing the conduct described — counterfeiting, currency fraud, forgery — should pivot immediately to those modern headings. The Roman law backdrop captured in Digest 48.19.16.9 places this term within the title De poenis (On Punishments), which is relevant context if the research concern is the history of criminal sanctions for monetary fraud.
Historical Dictionary Support
Black's (1st ed.), Black's (2nd ed.), and Burrill's are in complete agreement on this term. All three define adulterator as a Latin civil law term for a forger or counterfeiter, all three supply the identical exemplar phrase (adulteratores monetae), and all three cite the same Digest passage (48.19.16.9). The convergence is unsurprising — the term is unambiguous in its Roman law source and was never contested or developed further in common-law jurisprudence.
What the historical dictionaries do not address is any extension of the term beyond monetary counterfeiting. Roman law itself applied adulterare more broadly — to the falsification of documents and wills, for instance — but the dictionary entries narrow their illustration to coinage. Researchers should not assume the dictionaries are exhaustive on the term's civilian scope.
Burrill's entry adds the etymological note that adulterator derives from adulterare, meaning to corrupt or forge, which is useful for understanding cognate terms (adulteration, adulterine) that appear in both legal and non-legal contexts across the Law Mind corpus.