A person who has completed and graduated from a school, college, or course; an alumnus or alumna.
今年の卒業式では卒業生が三百人参加した。
Three hundred graduates attended this year's graduation ceremony.
多くの卒業生が母校に寄付をした。
Many alumni made donations to their alma mater.
卒業生代表が会場で挨拶をした。
The graduating-class representative gave a speech at the venue.