Definition
In legal usage, alumnus carries two distinct senses inherited from Roman law and later institutional practice:
1. (Historical/Roman law) A foster-child; a child nursed or raised by someone other than the biological parent. This meaning derives directly from the Digest and appears in early common law and civil law contexts in discussions of guardianship, status, and the obligations between foster parent and child.
2. (Institutional/modern) A person educated at a college, seminary, or other institution of learning. In this sense the term appears in legal instruments governing alumni associations, charitable organizations, donor agreements, bequests conditioned on institutional affiliation, and corporate charters for alumni bodies. It carries no formal legal definition in most statutes but acquires legal content from the governing documents of the institution or organization in question.
Common Language
Modern common usage (Wiktionary): A male pupil or student; a male graduate; increasingly used for a student or graduate of any gender.
Historical common usage (Webster's 1913): A pupil; especially, a graduate of a college or other seminary of learning.
The common meaning closely tracks the institutional legal sense, but the legal significance of the term is almost entirely determined by context. In a will, charter, or contractual instrument, whether someone qualifies as an "alumnus" for purposes of eligibility or benefit depends on the definition embedded in that document — not on the general cultural understanding. The Roman law sense (foster-child) has no counterpart in ordinary English usage and is invisible to researchers relying on contemporary reference materials alone.
Common Confusion
The two legal senses are historically unrelated and should not be conflated. A researcher encountering alumnus in a Roman law digest, a civil law treatise, or an early guardianship proceeding is reading about a foster-child relationship with associated duties of care and possible claims to freedom (as in manumission contexts). A researcher encountering the term in a nineteenth- or twentieth-century charter, bequest, or corporate filing is reading about institutional affiliation. Importing one meaning into the other context produces serious interpretive error.
Why It Matters in Research
The foster-child sense is the operative meaning in Roman law sources and in any civil law material drawing on the Digest. Researchers working in pre-modern or civil law contexts — particularly on questions of status, manumission, guardianship, or the legal relationship between patron and dependent — must treat alumnus as a term of art with no modern English equivalent. The Digest citation (Dig. 40, 2, 14) places it squarely in the law of manumission and the conditions under which foster-children could be freed or their status contested.
For researchers working in nineteenth- and twentieth-century American or English materials, the institutional sense dominates, but the term itself is almost never defined by statute. Its legal content is instrument-specific. In disputes over alumni association membership, eligibility for alumni-restricted scholarships or bequests, or the governance rights of alumni bodies within university charters, the operative question is always: how does this particular document define the class? Do not assume the term imports a uniform legal meaning.
Gender usage is a live issue in contemporary drafting and interpretation. Alumnus is grammatically masculine in Latin origin; the feminine form is alumna; the plural alumni is conventionally masculine or mixed-gender; alumnae is feminine plural. Modern institutional documents increasingly use alumni to cover all genders, or substitute gender-neutral terms (graduate, former student). In interpreting older instruments, a researcher should not assume alumni is inclusive of women without examining the drafting context and applicable interpretive rules for the jurisdiction and period.
Historical Dictionary Support
Black's Law Dictionary (both editions) and Bouvier's Law Dictionary are in agreement on both senses: the foster-child meaning comes first, grounded in Roman law, followed by the educational institution meaning. This sequence reflects genuine historical priority — the Roman law sense is older and more technically developed; the educational sense is a semantic extension that became dominant in Anglo-American usage.
Bouvier adds the useful cross-reference to alveus immediately after the alumnus entry, which is an artifact of alphabetical arrangement rather than conceptual connection, but researchers scanning Bouvier should not be confused by the proximity.
None of the historical dictionaries address the gender question or the modern drafting implications of the term, which is expected given their dates of composition. Black's and Bouvier's also do not discuss the instrument-specific nature of the institutional definition, a gap that matters most in contemporary research on nonprofit governance and charitable giving.
Jurisdictional Note
No U.S. jurisdiction has enacted a statutory definition of alumnus as a general matter. Meaning is governed entirely by institutional documents, charitable trust instruments, or corporate charters. Civil law jurisdictions with direct Roman law heritage may retain the foster-child sense in family law or succession contexts.