Definition
Efurtherance is an archaic legal term meaning the act of furthering, helping forward, promoting, or advancing a criminal project or conspiracy. It describes the conduct of one who assists or facilitates a crime already in progress or being planned — not as the principal actor, but as a contributor to its advancement.
The term appears in criminal law contexts as a label for the assistance or promotion element in conspiracy and accessory liability analysis. A person engaged in efurtherance of a criminal scheme contributes to the scheme's execution or success, whether through active participation, material support, or facilitation.
Common Confusion
Efurtherance should not be confused with "furtherance" as it appears in modern criminal law (particularly the "in furtherance of" element required in federal conspiracy statutes and wire fraud doctrine). The modern phrase survives and does real doctrinal work; "efurtherance" as a standalone noun does not. Researchers encountering "efurtherance" in historical sources should map it directly to modern "furtherance" without inferring any additional technical content.
Why It Matters in Research
Researchers will rarely encounter "efurtherance" as a standalone charge or as live legal terminology. The term is effectively obsolete in modern usage; contemporary courts and statutes address the same conduct through conspiracy doctrine, aiding and abetting, accessory liability, and facilitation offenses.
When searching historical sources — particularly 19th- and early 20th-century Kentucky and other state court opinions — "efurtherance" may appear where a modern source would use "furtherance." Treat it as a period equivalent of "in furtherance of," the phrase that survives robustly in modern criminal law. The distinction matters when building a search strategy across historical case law: both spellings and the full phrase should be included.
The sole cited case in Black's 2nd Edition (Powers v. Commonwealth, 114 Ky. 237) is a Kentucky opinion and suggests the term had at most regional currency. Researchers working in federal sources or other state traditions are unlikely to encounter it at all.
Do not confuse the historical use of "efurtherance" with a distinct legal doctrine. It describes an act, not a separate offense. Its significance lies in what it points toward: the furtherance element in conspiracy and accomplice liability, which remains one of the most litigated issues in criminal law.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) provides the only historical dictionary entry for this term, defining it as "furthering, helping forward, promotion, or advancement of a criminal project or conspiracy" in the criminal law context. The definition is brief and the sole supporting citation is Powers v. Commonwealth, a Kentucky case from 1903.
No entry for "efurtherance" appears in later editions of Black's, nor does the term surface in contemporaneous legal dictionaries such as Bouvier's. This suggests it was either a term of narrow regional use or a variant spelling that never achieved broad adoption. The concept it describes — assistance in or advancement of criminal conduct — was well understood under other vocabulary, which likely accounts for the term's disappearance.
What historical sources do not clarify is whether "efurtherance" ever carried a technical meaning distinct from the phrase "in furtherance of." Available evidence suggests it did not: it appears to be a nominalization of "further" used to describe the conduct rather than to define a separate legal standard.