どうきゅうせい同級生doukyuusei
1.

A student who shares the same grade level and attends the same class as another student.

2.

An individual in a specific academic cohort, typically within the same year of study, who interacts with others in a shared educational environment.

3.

A peer in school, particularly one who is enrolled in the same class or educational program, facilitating opportunities for collaboration and socialization.

Example:

私たちは当時は同級生だった。

どうきゅう同級doukyuu
1.

A group of individuals who are all in the same educational class or level, often sharing the same experiences and age.

2.

A classification that indicates individuals or items are of equal rank or category, sharing similar characteristics or status.