Definition
MAJORITY carries two distinct legal meanings that rarely overlap in practice but share a common root idea: reaching a threshold — of age, or of votes.
1. Age of majority. The age at which a person attains full legal capacity — the right to manage their own affairs, enter binding contracts, sue and be sued in their own name, and exercise civic rights such as voting. In most U.S. jurisdictions this is 18; historically it was 21. Attaining majority ends the legal condition of minority (infancy) and, absent other incapacity, confers full civil and legal standing. The status itself is sometimes called "majority" — a person is said to have "reached majority" or to be "of majority."
2. Majority of votes. In electoral and deliberative-body law, the greater number of votes cast — more than half of all votes counted. When only two candidates compete, majority and plurality are equivalent: whoever receives more votes has a majority. When three or more candidates compete, a candidate may lead without achieving a majority, which is why many bodies require a majority (over 50%) rather than a plurality (most votes, regardless of percentage) to elect or to pass a measure. The term also describes the winning margin itself — the numerical difference between the leader and all opponents combined, or between the leader and the runner-up, depending on context.
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Common Language
Modern common usage (Wiktionary): More than half of some group; in a legislature, the difference in seats between the ruling party and the opposition; legal adulthood; the office of a military major.
Historical common usage (Webster's 1913): The quality of being greater; specifically, the condition of being of full age authorized by law to manage one's own affairs; the greater number, more than half.
The common and legal meanings are largely parallel, but a researcher's trap lies in the electoral context. Ordinary English — and British parliamentary usage in particular — uses "majority" to mean the winning margin (candidate A won by a majority of 3,000 votes), while American legal usage typically means more than half of votes cast. A historical source using "majority" in an election dispute may mean either concept; context and jurisdiction determine which.
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Common Confusion
MAJORITY vs. PLURALITY. These terms are frequently conflated in legal sources and are sometimes used interchangeably in older texts. A majority requires more than 50% of votes cast. A plurality requires only more than any other single candidate received — a candidate can win a plurality with 35% of the vote in a crowded field. Many constitutions, corporate bylaws, and parliamentary rules specify which threshold applies. When reading historical documents on elections or deliberative bodies, never assume "majority" means "plurality" or vice versa without checking the governing instrument.
MAJORITY vs. SUPERMAJORITY. Some legal texts use "majority" loosely where a supermajority (two-thirds, three-fourths) is actually required. Constitutional amendments, treaty ratification, and certain corporate actions require supermajorities; the bare word "majority" in those contexts should prompt verification of the specific threshold.
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Recognized Forms
/SUBTYPES
Age of majority. The statutory age threshold triggering full legal capacity. Historically fixed at 21 in common law jurisdictions; lowered to 18 in most U.S. states following the 26th Amendment (1971) and corresponding state legislative action. May vary by purpose — a state may set 18 as the general age of majority while setting different ages for alcohol, gambling, or firearm purchase.
Simple majority. More than half of votes cast by those present and voting. The default threshold for most legislative and deliberative actions absent a specific higher requirement.
Absolute majority. More than half of all members of a body, whether or not they vote. A stricter standard than simple majority because abstentions effectively count against the measure.
Supermajority. A threshold above simple majority — typically two-thirds or three-fourths — required by governing instruments for extraordinary actions. Distinct from majority proper, though sometimes loosely described as a "qualified majority."
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Why It Matters in Research
Age of majority research requires attention to the date of the source. The historical common law age was 21, and this remained the dominant U.S. standard through the mid-twentieth century. Sources predating state legislative reform in the early 1970s will reflect the 21-year threshold. A researcher examining child support obligations, contract capacity, or inheritance rights in historical materials must verify which threshold governed at the relevant time. Many states lowered the age by statute in waves between 1971 and 1975, so a 1968 treatise and a 1976 treatise may state irreconcilable rules — both correctly reflecting the law of their moment.
In the family law context, age of majority intersects with emancipation and child support duration. Emancipation can occur before majority; some child support obligations extend beyond majority by statute or agreement. The Law Mind Family Law Encyclopedia entry on child support duration addresses this layering directly.
For electoral and corporate law research, the majority/plurality distinction is a recurring ambiguity in primary sources. Early state constitutions, corporate charters, and parliamentary manuals often specify "majority" without further definition. Courts have had to construe whether a bare majority of those voting, or a majority of all members, was required — and answers have not been uniform. Bouvier's caution about this ambiguity (whether majority means more than half the whole number or more than the number acting in opposition) remains a live research issue for historical documents.
In deliberative body law — including legislative procedure, corporate governance, and union elections — majority rules vary by context and governing instrument. Federal labor law, state corporate statutes, and parliamentary procedure treatises each define majority differently for different purposes. Never import a definition from one domain into another without checking the applicable rule.
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Historical Dictionary Support
The historical dictionaries are consistent on age of majority: Black's (both editions), Anderson's, and Bouvier's all define it as attaining full age — the condition opposite to minority or infancy — and all reflect the common law threshold of 21. Anderson's is the most sparse, simply noting "full age of twenty-one years." None of the historical sources address the mid-twentieth-century legislative shift to 18, which is expected given their publication dates.
On the voting sense, Bouvier's is the most analytically useful of the historical sources, explicitly flagging the ambiguity: "Some question exists as to whether a majority of any body is more than one-half the whole number or more than the number acting in opposition." This is an important signal to researchers that even the foundational dictionaries recognized the definition was contested. Black's (both editions) addresses the two-candidate case cleanly — majority and plurality coincide — but does not fully develop the multi-candidate or deliberative-body complications.
Webster's 1913 adds the now-obsolete sense of "ancestors; ancestry," which has no legal significance for modern research but may surface in reading very old texts.
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Jurisdictional Note
The age of majority is 18 in most U.S. states and in federal law for most purposes, but state statutes control for state-law matters including contracts, child support, and inheritance. A handful of states retain 19 or 21 for specific purposes. In corporate and parliamentary law, the applicable majority threshold is set by the governing instrument — articles of incorporation, bylaws, constitution, or applicable statute — and varies widely; no uniform national default applies.
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Encyclopedia Cross-Reference
Child Support — Duration of Support Obligation (Emancipation, Age of Majority) (The Law Mind Family Law Encyclopedia)
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