Teacher n. : One who teaches or instructs; one whose business or occupation is to instruct others; an instructor; a tutor.

Teacher n. : One who instructs others in religion; a preacher; a minister of the gospel; sometimes, one who preaches without regular ordination.

Example:
How is Teacher tenure harmful to the school system and what are bad effects Teacher tenure has on schools?

Taxonomy
teachers, Salaries, secondary school teachers, Spiritual teacher, guru, around the world, United States, public school, schools, primary school, colleges, teacher salary, free encyclopedia, educator, education, skills, classroom teachers, teacher education programs.

Defination from the web:
teacher is often formal and ongoing, carried out by way of occupation or profession at a school or other place of formal education. In many countries, a person wishing to become a teacher at state-funded schools must first obtain professional qualifications or credentials from ...