an area within a building enclosed by walls and floor and ceiling

壁、床、天井に囲まれた建物の内部の領域

a classroom in which all students in a particular grade (or in a division of a grade) meet at certain times under the supervision of a teacher who takes attendance and does other administrative business

全ての生徒が特定の学年（または学年の一部）において、出席を取ったり、その他の管理業務を行う教師の監督の下、特定の時間に集まる教室

a classroom reserved for study

勉強のために予約された教室

classroom where lectures are given

講義が行われる教室

a building where young people receive education

若者が教育を受ける建物