Used attributively before another noun to mean 'relating to pupils (students)'.
Translations
Pupil reflexes are tested by shining a light into each eye.
Зрачковые рефлексы проверяют, направляя свет в каждый глаз.
The school organised a pupil council.
Школа организовала ученический совет.
Definitions
Relating to pupils (students) or intended for pupils; scholastic. The school introduced new pupil assessment procedures.
Relating to the pupil of the eye. Pupil reflexes are tested by shining a light into each eye.