teacher; instructor; sensei; title or form of address for a teacher, master, doctor, lawyer, etc.; intimate or teasing form of address; (arch.) one's elder
Examples (3 in total)
彼らの担任の先生は誰ですか。
Who is their homeroom teacher?
すべての学生が担任の先生を尊敬している。
All the students respect their home room teacher.
担任の先生が来年も持ち上がるらしい。
I hear our homeroom teacher is moving up with our class again next year.