Definition
A unit of liquid measure equal to eighteen gallons, historically used in English and American commercial and trade law to specify quantities of ale, beer, and other liquids. The kilderkin appears primarily in statutes, contracts, and customs records governing the sale and taxation of beverages, where precise measurement of barrel-based units carried legal consequence.
Common Language
Modern common usage (Wiktionary): A small barrel; an old English liquid measure, usually being half a barrel, containing 18 English beer gallons, or approximately 83.178 liters.
Historical common usage (Webster's 1913): A small barrel; an old liquid measure containing eighteen English beer gallons, or nearly twenty-two gallons, United States measure. Also written kinderkin.
The gap between common and legal usage is narrow here, but meaningful in one respect: common usage treats the kilderkin as a physical container, while legal usage treats it as an abstract unit of measure. In a statutory or customs context, a kilderkin need not refer to a barrel at all — it is a quantity, and the vessel is incidental. Researchers reading trade statutes or excise records should not assume the term implies anything about the container itself.
Why It Matters in Research
The kilderkin is the kind of term that will stop a researcher cold if encountered in a historical statute, excise regulation, customs entry, or commercial pleading without context. Its importance is almost entirely historical — it belongs to the pre-metric vocabulary of English and American trade law governing ale, beer, vinegar, and similar commodities.
Several navigational points for corpus researchers:
First, the eighteen-gallon figure is consistent across all three dictionary sources, but the precise gallon being referenced matters. English beer gallons and U.S. wine gallons differ. Webster's 1913 flags this directly, noting the U.S. equivalent is nearly twenty-two gallons. When reading pre-metric statutes — particularly excise or import duties — researchers must determine which gallon standard the drafting jurisdiction was using. An English statute and an American statute that both say "kilderkin" are not describing the same physical quantity.
Second, the kilderkin sits in a hierarchy of barrel-based measures. Understanding where it falls — typically half a barrel, or a quarter of a hogshead, in the English beer trade — is essential for interpreting quantity disputes, excise assessments, or shortage claims in historical records. A contract specifying payment per kilderkin requires knowing the full unit hierarchy to assess damages or duties on partial deliveries.
Third, spelling variants are a real trap. Webster's 1913 notes the alternate spelling kinderkin. Historical records may also render it as kenderkin or kennerkin. Full-text corpus searches should account for these variants.
Fourth, Bouvier's entry for KILDERKIN is embedded in a longer passage that shifts without clear break to define KILL — a Dutch geographical term used in Delaware and New York referring to a creek or river bed. Researchers using scanned or OCR'd versions of Bouvier's should be alert to this adjacency; indexing errors or search retrieval may conflate the two entries or return incomplete results.
Historical Dictionary Support
All three sources are in agreement: the kilderkin equals eighteen gallons. There is no divergence on the core definition. Black's (both editions) offers nothing beyond this single sentence. Bouvier's matches but similarly provides no elaboration on legal context, statutory use, or jurisdictional variation.
What the historical dictionaries collectively omit is notable. None addresses the unit hierarchy in which the kilderkin sits, none discusses the English beer gallon versus wine gallon distinction, and none identifies specific statutes or customs schedules where the term appears. For a term whose entire legal significance lies in precise quantification within a regulatory framework, this is a significant gap. Researchers who need the kilderkin in an operative legal context — rather than a simple definitional gloss — will need to go beyond these entries to the underlying excise statutes and trade records of the relevant period and jurisdiction.
Jurisdictional Note
The kilderkin is primarily a term of English law and early American law derived from it. In U.S. contexts, the applicable gallon standard may differ from the English baseline, producing a materially different quantity under the same term. Researchers working with pre-1900 American statutes or customs records should verify the gallon standard in use before treating any kilderkin-denominated figure as equivalent to its English counterpart.