Here are some related words. - (같은) 반 친구 = classmate (a friend who's currently in the same class). - (같은) 하교 친구 = schoolmate (a friend who goes to the same school). - 동급생 = a friend who's in the same grade(급) of school (usually but not always in the same school). - 동문 = alumnni (those who graduate from the same school but not in the same year). - 동창생 (or 동창) = 1) 동문, 2) old classmate (alumnus who graduate in the same year). We use 동창생 to refer to a friend(s) from the school a person graduated from, not one they are currently attending. Similarly 동문 refers to graduates of the school, not including the current students. Examples: - 그 친구와 난 고등하교 동창(생)이다 = He and I went to the same high school (we both have already graduated). - 대학 동문들은 사회 각 분야에 진출해 있다 = Graduates of my alma mater are now working in all sectors of society.

동급생 - classmate, schoolmate ,동창생 - alumnus,alumia . 동창생은 schoolmate 뜻하고는 거리가 있습니다.