English word borrowed from Latin. It means
male former student or
graduate student from
one university or a college.
Alumni is the plural and it is used for groups composed of male and groups of male and female students together. When speaking about a female student we use the word
Alumna and the plural
Alumnae.
These Latin words in English have maintained the same original meaning, but the pronunciation has changed.
Listen to the Latin pronunciation of
Alumnus,
Alumni,
Alumna,
Alumnae