Alumni and Emeriti

Western Michigan University has a very handy reference guide on distinguishing the various forms of Alumni and Emeriti.

TermDescription/DefinitionExample
Alumna Singular female i.e. a female graduate or former student of a particular school, college, or university.  Jane is an alumna.
AlumnusSingular male i.e. a male graduate or former student of a particular school, college, or university.John is an alumnus.
AlumnaePlural female i.e. female graduates or former student of a particular school, college, or university. Jane and Mary are alumnae.  
AlumniPlural male and plural when both men and women are included.John, Jane and Mary are alumni.
Emerita Singular female i.e. a female professor having retired but allowed to retain her title as an honor.  Jane is an emerita.
EmeritusSingular male i.e. a male professor having retired but allowed to retain his title as an honor.John is an emeritus.
Emeritae Plural female i.e. female professors having retired but allowed to retain their title as an honor  Jane and Mary are emeritae.
EmeritiPlural male and plural when both men and women are included.John, Jane and Mary are emeriti.