1.
the whole school; all students
The entire school, meaning every student (and often the staff) of a single school taken together.
全校で歌を歌った。
The whole school sang a song.
全校集会が体育館で開かれた。
A whole-school assembly was held in the gymnasium.
この取り組みには全校の生徒が参加した。
Every student in the school took part in this initiative.
Prefix 全 (whole, all) + 校 (school). Usually used attributively before another noun rather than standing alone.
COMMON COLLOCATIONS:
- 全校集会: a whole-school assembly
- 全校生徒: all the students of the school
- 全校朝会: a whole-school morning meeting