Definition of alumnus
1
: a person who has attended or has graduated from a particular school, college, or university
an alumnus of Columbia University
—usually used of a man in the singular but often of men and women in the plural
2
: a person who is a former member, employee, contributor, or inmate
a Saturday Night Live alumnus
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Merriam-Webster unabridged
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Time Traveler for alumnus
The first known use of alumnus was in 1645
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