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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
ROGET THESAURUS

WORDNET DICTIONARY

Noun alumnus has 1 sense

• alumnus(n = noun.person) alum, alumna, grad, graduate - a person who has received a degree from a school (high school or college or university); Array
has particulars: ivy leaguer, old boy
is a kind of bookman, scholar, scholarly person, student

CIDE DICTIONARY

OXFORD DICTIONARY

ROGET THESAURUS

alumnus

Learner

N learner, scholar, student, pupil, apprentice, prentice, journeyman, articled clerk, beginner, tyro, amateur, rank amateur, abecedarian, alphabetarian, alumnus, eleve, recruit, raw recruit, novice, neophyte, inceptor, catechumen, probationer, seminarian, chela, fellow-commoner, debutant, intern, resident, schoolboy, fresh, freshman, frosh, junior soph, junior, senior soph, senior, sophister, sophomore, questionist, undergraduate, graduate student, law student, medical student, pre-med, post-doctoral student, post-doc, matriculated student, part-time student, night student, auditor, class, grade, seminar, form, remove, pupilage, disciple, follower, apostle, proselyte, fellow-student, condisciple, school, in statu pupillari, in leading strings, practise makes perfect.

For further exploring for "alumnus" in Webster Dictionary Online