Do dropouts have an alma mater and are alumni of the institution where they dropped out in the respective phase of their studies (undergraduate, master or doctorate)? Or are these terms only meant for successful graduates?
E.g., is a student dropping out from the master/PhD an alumni of the university where he/she tried the master/PhD or of the university where he/she graduated with the next lower degree (BSc/master)?
A person who drops out is technically an alumnus however the term normally is used for someone who actually graduated. It can refer to anyone who is a former student or even employee of an institution.