/ Dictionary / Index A alumnus: Meaning and Definition of Find definitions for: a•lum•nus Pronunciation: (u-lum'nus), [key] — pl. -ni a graduate or former student of a specific school, college, or university. a former associate, employee, member, or the like: He invited all the alumni of the library staff to the party. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alumnus (Thesaurus) alumna Alum Rock Related Content Daily Word Quiz: sedentary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language