teacher
n. countable A1 Beginner Oxford US //ˈtitʃɝ// UK //tˈiːtʃɐ// teach·er
n. a person whose job is to help others learn new things, usually in a school or college.
n. a person who provides education for students; a professional practitioner of pedagogy within a formal or informal educational setting.
The teacher explains the lesson to the class.
After the lecture, the teacher stayed behind to answer questions from students who were struggling with the math problems.
A truly effective teacher does more than impart facts; they cultivate a sense of curiosity and provide the analytical tools necessary for students to navigate complex subjects independently.
From Middle English techere, equivalent to teach + -er. More at teach.
Usage
Commonly takes the preposition 'of' when specifying a subject, such as a 'teacher of history'.