Alumnus is a masculine noun whose plural is alumni , and alumna is a feminine noun whose plural is alumnae. Coeducational institutions usually use alumni for graduates of both sexes. Alumni (sg.: alumnus (MASC) or alumna (FEM)) are former students or graduates of a school, college, or university . The feminine plural alumnae is sometimes used for groups of women, and alums (sg.: alum) or alumns (sg.: alumn) as gender-neutral alternatives. The term “alumni” refers to a group of individuals who have graduated or studied at a school, college, or university . It implies that former students still have a connection to their school. This connection is not just founded on education but also on experiences, memories, and belongingness. the former students of a school, college or university. Definition of alumni noun in Oxford Advanced Learner's Dictionary. Meaning , pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.