Definition
In law, masculine refers to the male sex as a descriptive or classificatory term. Its primary legal significance is not as a substantive concept but as a grammatical and interpretive one: whether statutory language using masculine pronouns or gender-specific nouns applies only to males or extends to females and others.
As a rule of statutory construction, the masculine gender in legislative text has long been interpreted to include the feminine unless the statute expressly restricts it or context makes such inclusion inconsistent with the legislature's intent. This canon of construction — sometimes codified in general definition acts or interpretation statutes — means that a law referring to "he," "his," or "him" generally governs women as well as men, absent contrary indication.
Common Language
Modern common usage (Wiktionary): Of or pertaining to the male sex; biologically male. Also used to describe qualities stereotypically associated with men (virility, strength, assertiveness), and in linguistics, denoting a grammatical gender class.
Historical common usage (Webster's 1913): Of the male sex; not female. Also, having the qualities of a man — strong, robust, virile — as distinct from feminine or effeminate qualities.
The gap between common and legal meaning is not one of opposition but of scope. In ordinary language, masculine describes a characteristic or quality. In law, masculine functions primarily as a canon of construction: courts and drafters ask not what masculine means in the abstract but whether masculine-gendered statutory language limits the reach of a provision or whether it should be read neutrally to encompass all persons regardless of sex.
Common Confusion
The interpretive canon that masculine includes feminine is sometimes misread as a rule of gender neutrality imposed on the substance of a law. It is not. The canon addresses grammatical usage in legislative drafting, not the policy question of whether a law applies equally to men and women. A statute using masculine pronouns may still discriminate on the basis of sex in its substantive provisions; the interpretive rule does not cure that.
Why It Matters in Research
Researchers working with pre-twentieth-century statutes, case law, or treatises must handle masculine-gendered language carefully. The historical canon — that masculine includes feminine — was not consistently applied and was frequently contested when women sought to invoke legal rights under statutes drafted in masculine terms. Courts sometimes applied the canon to impose burdens on women (holding them liable under masculine-gendered criminal statutes) while simultaneously refusing to extend masculine-gendered rights provisions to women. This asymmetry is a documented feature of nineteenth-century legal reasoning and will appear throughout primary sources in the Law Mind corpus.
The canon's codification in English law under 13 & 14 Vict. c. 21, § 4 (1850) — often called the Interpretation Act — marked a significant moment: Parliament legislated the default rule rather than leaving it to case-by-case judicial construction. American states followed with analogous general interpretation statutes at varying points, creating jurisdictional variation in when and how the canon became settled law. Researchers using early American sources should not assume the codified English rule applied domestically without verification.
Modern drafting has largely eliminated the issue: contemporary legislation in most common-law jurisdictions uses gender-neutral language, and where masculine pronouns persist they are typically caught by general interpretation acts. The term masculine therefore appears far more frequently in historical sources than in modern ones, and its interpretive significance is greatest when analyzing older legal texts.
Historical Dictionary Support
The three source dictionaries agree on the foundational point — masculine means of the male sex — but diverge considerably in how much they develop the interpretive dimension.
Black's Law Dictionary offers only the bare definition ("of the male sex"), providing no guidance on the construction canon. Rapalje & Lawrence give the more useful entry for researchers: they identify the canon explicitly and cite the English Interpretation Act, situating the term within statutory construction doctrine rather than mere definition. Burrill goes furthest, quoting the Digest maxim — Semper sexus masculinus etiam femininum sexum continet (the masculine sex always includes the feminine) — which traces the canon to Roman law and signals its deep common-law roots. Burrill also notes the apposition of muli (mules, masculine) including mulae (mules, feminine), illustrating that the canon operated even in non-human contexts in the civil law tradition.
What none of the historical sources adequately address is the contested application of the canon in cases where women sought to assert rights under masculine-gendered statutes. The dictionaries present the rule as clean and settled; the case law history is considerably messier.
Jurisdictional Note
The codified form of the interpretive canon varies by jurisdiction. English law settled it by statute in 1850. American states enacted analogous provisions at different times and with varying formulations; some required the canon to be applied unless "repugnant" to the legislative intent, others unless "inconsistent." Researchers should identify the applicable general interpretation statute — and its effective date — before relying on the canon for any specific jurisdiction and time period.
Encyclopedia Cross-Reference
Law Mind Encyclopedia — Statutory Construction (canon of gender-inclusive interpretation)
Law Mind Encyclopedia — Gender and the Law (historical application of masculine-gendered statutes to women)