Definition
In legal usage, "virtue" appears almost exclusively in the prepositional phrase "by virtue of," where it means by the authority, force, or legal operation of something — as in "by virtue of this statute" or "by virtue of his office." The term itself rarely stands alone as a legal noun. Where it does appear independently, it carries two distinct senses:
1. BY VIRTUE OF: By the rightful authority, legal power, or operative effect conferred by a law, instrument, office, or legal status. An officer acts "by virtue of" office when the act is within lawful authority. A right arises "by virtue of" a contract when the contract itself creates it.
2. VIRTUE AS MORAL QUALITY (archaic legal usage): In older pleading and criminal law contexts, particularly those touching on character evidence, chastity, and sexual offenses, "virtue" was used to denote moral excellence or purity — especially, and narrowly, chastity in women. This sense survives only in historical materials.
---
Common Language
Modern common usage (Wiktionary): The aggregate of all that is morally good or excellent in a human being; conformity of behavior to moral principles; a specific moral quality considered admirable.
Historical common usage (Webster's 1913): Active quality or power adequate to the production of a given effect; energy or potency. Also, manly strength or courage (now obsolete). The moral sense coexisted with a sense of efficacy or inherent force.
The gap matters: Common usage centers on moral character and ethical excellence. Legal usage evacuates almost all of that content. "By virtue of" in legal text is a term of authority and legal operation, not moral approbation — a statute operates "by virtue of" its enactment regardless of whether anyone considers it virtuous. Researchers reading historical statutes, writs, or pleadings that use "by virtue" should parse the phrase as a legal mechanism, not a moral endorsement. The narrower moral sense — especially "virtue" meaning chastity — appears in criminal law and evidence contexts but is effectively dead in modern practice.
---
Common Confusion
"By virtue of" versus "under color of" are frequently treated as interchangeable in casual legal writing. They are not. The distinction is precise and functional: an officer who acts by virtue of office acts within lawful authority; an officer who acts under color of office asserts authority the law does not actually confer. Proper fees collected by a sheriff are received by virtue of office. Money extracted through threatened abuse of official power is taken under color of office — the latter being the operational concept behind extortion and, in constitutional law, the "under color of law" standard for civil rights claims. Conflating the two obscures whether a challenged act was authorized or merely cloaked in the appearance of authority.
---
Why It Matters in Research
Researchers in the Law Mind corpus will encounter "virtue" in three distinct research contexts, each requiring a different interpretive posture.
First, "by virtue of" saturates historical legal instruments — statutes, writs, patents, commissions, and deeds. In these contexts the phrase is doing load-bearing legal work: it identifies the source of authority for an act or the legal mechanism by which a right or obligation arises. Reading past it as mere rhetoric will cause researchers to miss the operative chain of authority.
Second, the "by virtue / under color" distinction is a durable organizing concept that runs from early common law through Reconstruction-era civil rights statutes and into modern Section 1983 litigation. Researchers tracing the development of official immunity, extortion, or civil rights liability will find the distinction in play across widely separated eras of the corpus. Historical sources use "by virtue" and "under color" as technical opposites; modern sources may be less careful. Flag any historical source that appears to collapse the distinction.
Third, "virtue" as moral quality — particularly chastity — appears in nineteenth-century criminal law treatises and case reporters in contexts involving rape, seduction, and character evidence. The admissibility of evidence bearing on a complainant's "virtue" was a contested evidentiary question throughout this period. Researchers working in criminal law history should treat "virtue" in those materials as a term of art tied to specific evidentiary rules, not as generic moral language. Most modern evidence codes have replaced or abolished these provisions entirely.
---
Historical Dictionary Support
The historical dictionaries converge on the by-virtue/under-color distinction as the primary legal content of this term, and the formulation is consistent across editions of Black's and Anderson's. All three sources use nearly identical language drawn from Philips on Evidence (cited as "Phil. Law"), suggesting a common authoritative source for the distinction rather than independent development.
Anderson's is the most expansive of the three, adding the moral quality sense explicitly and cross-referencing CHARACTER and CHASTE — a useful reminder that in historical criminal law research the two meanings of "virtue" operated in different doctrinal neighborhoods but could appear in the same case. Anderson's also notes the Latin root (*vis*, force; *violare*, to use force), which illuminates the older Webster's sense of virtue as active power or efficacy. That etymological thread — virtue as inherent operative force — explains why "by virtue of" came to mean "by the operative legal force of" rather than "because it is morally good."
What the historical dictionaries do not address: the constitutional dimension of "under color of law" as developed under the Civil Rights Acts and later Section 1983. Researchers should not rely on these entries for that lineage; it postdates their primary framing.
---
Jurisdictional Note
The by-virtue/under-color distinction is a concept of general common law origin and applies across American jurisdictions, but its constitutional elaboration through "under color of law" is exclusively a federal doctrine. State law extortion and official misconduct statutes vary in how they deploy the underlying concept.
---