[noun] [C] - a room in a school or college where groups of students are taughtShe was behaving so badly that the teacher told her to go and stand outside the classroom.(figurative) Students learning computer studies spend two days each week in a computer lab and four days in the classroom (= being taught by a teacher).(figurative) There are also no promotions or hierarchies within the school, so that teachers remain in the classroom (= they continue teaching) throughout their careers.
CLASSROOM
Meaning of CLASSROOM in English
Cambridge English vocab. Кембриджский английский словарь. 2012