noun which may take the genitive case particle 'no', noun
previously graduated; already graduated
Used in contexts like job hunting to describe someone who has already graduated from school, as opposed to a current student or new graduate. Often appears as 既卒者 or in the phrase 既卒・第二新卒.
この企業は既卒者も応募できます。
This company also accepts applications from those who have already graduated.
既卒・第二新卒向けの就職イベントに参加した。
I attended a job-hunting event for those who have already graduated and for second-time new graduates.
Compound of 既 (already) and 卒 (graduate). The exact historical derivation is uncertain, but the word is a straightforward Sino-Japanese compound used in modern employment contexts.