noun
A physical room where classes or lectures are held, in schools, universities, or training centers.
教室に入ると、もうみんな席に着いていた。
When I entered the classroom, everyone was already seated.
noun
Refers to an academic department or faculty within a university, such as 国語教室 (Japanese department).
彼は大学の国語教室に所属している。
He belongs to the Japanese department at the university.
noun
A class session, lesson, or course of study, often used in contexts like 教室を開く (to hold a class) or 料理教室 (cooking class).
来月から英会話教室に通うつもりだ。
I plan to attend an English conversation class from next month.
noun
school (for a discipline); teaching establishment
A specialized school or teaching establishment, such as a music school (音楽教室) or calligraphy school (書道教室).
See also: 音楽教室
娘は週に一度、ピアノ教室に通っている。
My daughter goes to a piano school once a week.