One who teaches, especially one hired to teach. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "teacher" in a sentence
"The teacher who neither teaches nor can teach them to his pupils is a _bad teacher_; the pupil who, notwithstanding the urgent warnings of his teacher, neglects the exercises that can help him to acquire them, and fails to perfect himself in them, is a _bungler_."
"Such classroom observations are an absolute measure; the rating of a teacher is against a fixed yardstick of what constitutes good practice, not against other teachers."
"No, this particular rudeness just tells us the teacher is a pompous atheist."