同どう級きゅう生せい

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Common wordJLPTN1Freq.FrequencyTop 10,000

Meanings

Refers to a person in the same class or grade at school. Neutral and widely used.

〈場ば所しょ〉の同どう級きゅう生せいa classmate from (a certain school)
彼かれは高こう校こうの同どう級きゅう生せいだ。
He is a classmate of mine from high school.
〈人ひと〉と同どう級きゅう生せいになるto become classmates with someone
引ひっ越こしてから彼かれと同どう級きゅう生せいになった。
After I moved, I ended up becoming his classmate.
同どう級きゅう生せいに会あうto meet up with a former classmate
同どう窓そう会かいで昔むかしの同どう級きゅう生せいに会あった。
I met an old classmate at the reunion.

クラスメート
クラスメート is a casual loanword for classmate, while 同級生 is the standard, neutral native term used in most contexts.
同どう期きN3
同期 means someone who entered the same school or company in the same year, whereas 同級生 specifically means being in the same class or grade.
級きゅう友ゆうN1
級友 is a slightly more literary or old-fashioned word for classmate, while 同級生 is the common everyday term.
同どう窓そう
同級生 means a classmate in the same grade or class, while 同窓 refers specifically to someone who graduated from the same school, regardless of grade.
学がく友ゆう
同級生 just means someone in the same grade or class, while 学友 implies an actual friendship formed at school.

同どう窓そう生せい
同窓生 means a fellow alumnus of the same school regardless of graduation year, while 同級生 specifically means someone in the same class or grade.
同おない年どしN2
同い年 means being the same age, whereas 同級生 means being in the same class/grade, which does not always imply the same age.
同どう窓そう会かいN1
同窓会 is the reunion event or alumni organization itself, while 同級生 refers to an individual classmate who might attend it.
同どう郷きょうN1
同郷 refers to sharing a hometown or region, whereas 同級生 refers to being in the same class or grade at school, a different kind of shared connection.

人にん
The everyday counter for people: 一人 (ひとり), 二人 (ふたり), 三人 (さんにん).
名めいN2
More formal than 人 — used for headcounts in reservations, staff lists, and announcements (5名様).

Compound of 同 (same) + 級 (class/grade) + 生 (student/life). The meaning is transparent from its components.