校友|こうゆうkouyuu[0]heiban (flat)

1. nounschoolmate; alumnus

• Synonym同窓どうそうWrittenWritten/formal prose. Covers having studied at the same school or under the same teacher, with no need to be in the same year; mostly seen in 「同窓会」.
• Synonym学友がくゆうWrittenWritten/formal prose. A friend one studies with, or a peer in the same academic field; unlike 「校友」 it implies friendship rather than just a shared school.
• Synonym卒業生そつぎょうせいNeutralNeutral. A graduate as such — it stresses having completed school, not the same-school tie that 「校友」 expresses.
• Synonym同窓生どうそうせいNeutralNeutral. A person who studied at the same school or under the same teacher; close to 「校友」 in meaning and often interchangeable.

For students or graduates of the same school, 「校友」 is the default, common in 「校友会」 and 「校友名簿」; call a class reunion 「同窓会」; for graduates, 「卒業生」 is the word.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 同おなじ学校がっこうを通かよい学まなぶ友達ともだち。
2. 同おなじ学校がっこうの卒業生そつぎょうせい、同窓生どうそうせい。
3. 学校がっこう経営けいえい等とうに関かんする協力者きょうりょくしゃとして学校がっこうが認みとめる者もの。