A small library or book room (often single-room), such as those in schools or facilities; usually smaller in scale than a public library.
学校の図書室で宿題に必要な本を借りた。
I borrowed the book I needed for homework from the school's library room.
図書室は放課後、静かに勉強する生徒でいっぱいだった。
After school the library room was full of students studying quietly.
図書室の利用規則を守って本を扱ってください。
Please handle books in accordance with the library room's rules.