Definition
A Latin adverbial term used in civil and canon law contexts meaning clearly, evidently, or manifestly. In legal usage, *liquido* qualifies a statement, claim, or oath to indicate that the matter is established beyond reasonable doubt or controversy — that it is plain and unambiguous on its face. The term appears most often in the phrase *liquido jurare*, meaning to swear clearly or to take an oath upon certain and manifest grounds, as distinguished from an oath taken upon uncertain or contested facts.
The term is closely connected to the civil law concept of a *liquid* or *liquidated* claim — one that is ascertained, fixed, and not subject to dispute as to its amount or existence. *Liquido* functions as the adverbial form expressing that quality of certainty in procedural and evidentiary contexts.
Common Language
Modern common usage (Wiktionary): In general English, *liquid* refers primarily to a state of matter (neither solid nor gas) or, in financial contexts, to assets readily convertible to cash.
Historical common usage (Webster's 1913): Webster's 1913 gives *liquid* in a figurative sense as "flowing; smooth; flowing freely without harshness," and acknowledges the financial sense of assets easily converted.
The gap between common and legal meaning here is significant. Neither the physical nor the financial common usage captures what *liquido* signals in legal Latin: a quality of epistemic certainty and legal clarity attached to a claim or oath. A researcher encountering *liquido* in a civil law text should not assimilate it to modern financial "liquidity" without first confirming context, even though both senses share a root idea of settled, unobstructed character.
Common Confusion
*Liquido* is easily conflated with the adjective *liquidus* and the related common-law concept of a *liquidated* debt or *liquidated damages*. These share etymological ancestry and conceptual overlap — both concern certainty and ascertainment — but they operate differently. *Liquidated* in common-law usage typically refers to a sum fixed by agreement or calculation, a pre-estimated measure of damages. *Liquido* in civil law sources functions adverbially and epistemically, describing the manner or quality of knowing or swearing, not merely the arithmetic fixity of a sum. Researchers working in mixed civil-law/common-law jurisdictions or in historical texts spanning both traditions should not assume the terms are interchangeable.
Why It Matters in Research
*Liquido* appears almost exclusively in civil law and canon law sources, and its presence in an English-language legal text is a strong signal that the author is drawing on Roman or Continental authority rather than common-law doctrine. Burrill's entry is spare, pointing back to Calvinus's *Lexicon Juridicum* for full elaboration — a reminder that for genuinely technical civil law Latin, the secondary English-language dictionaries of the nineteenth century often function as indexes to primary Continental sources rather than as self-contained authorities.
Researchers in the Law Mind corpus should watch for *liquido* in contexts involving oath-taking procedures, the proof of debts in equity or admiralty, and civil law pleading treatises. The phrase *liquido jurare* — to swear clearly — carries evidentiary weight in sources governing when a party could take a decisory or suppletory oath on the strength of manifest facts. This is a procedural mechanism with no precise common-law equivalent, and reading *liquido* as mere rhetorical emphasis will cause researchers to miss its technical function.
The Burrill entry also gestures toward *litis pendentia* and *litis contestatio* in the same column, which is a navigational clue: these terms cluster in sources discussing the formal stages of civil law litigation. A researcher tracing *liquido* should expect to move into that constellation of procedural vocabulary.
Because the term appears in Latin without translation in many primary sources, corpus searches in English alone will miss it. Searches should be run on the Latin form.
Historical Dictionary Support
Burrill's is the primary English-language law dictionary source here, and its entry is notably compressed: it gives the meaning (clearly, evidently, manifestly), attributes the definition to Calvinus (*Lex.*), and immediately pivots to the phrase *liquido jurare* before the column continues with unrelated entries. This compression is characteristic of Burrill's treatment of civil law Latin terms that had limited reception in English common-law practice — he records them for completeness but does not elaborate.
The reference to Calvinus's *Lexicon Juridicum* (a major seventeenth-century Latin legal dictionary compiled by Johannes Calvinus, published in various editions from the early 1600s) is the key bibliographic pointer. Researchers needing full doctrinal elaboration of *liquido* and its cognates in the Roman and canon law traditions should treat Burrill's entry as a waypoint rather than a destination.
No other major English-language historical dictionaries (Jacob, Tomlin, Bouvier) appear to give *liquido* a dedicated entry, which confirms its status as a term of art in civilian rather than common-law learning.
Jurisdictional Note
*Liquido* and *liquido jurare* are terms of the civil law tradition and appear most frequently in sources from Louisiana, Quebec, Scotland, and South Africa — jurisdictions with mixed or civilian legal heritages — as well as in admiralty and ecclesiastical law sources across common-law jurisdictions. Researchers working in purely common-law contexts are unlikely to encounter the term outside of treatises citing Continental authority.