teacherteach‧er /ˈtitʃɚ/ ●●● noun [countable] 
someone whose job is to teach: 
my history teacherTHESAURUSteacher – someone who works in a school, or who helps a person learn something: Marie is a high school teacher. I have a lesson with my guitar teacher at noon.professor – a teacher in a university or college: The professor suggested I read a biography of Thoreau.lecturer – a teacher in a university or college who has a lower rank than a professor: She’s a lecturer in the Psychology Department.instructor – someone who teaches a sport or a practical skill such as driving: Do you like your skiing instructor? My driving instructor taught me to parallel park.coach – someone who trains a person or team in a sport: The coach said we played well.
someone whose job is to teach: my history teacherTHESAURUSteacher – someone who works in a school, or who helps a person learn something: Marie is a high school teacher. I have a lesson with my guitar teacher at noon.professor – a teacher in a university or college: The professor suggested I read a biography of Thoreau.lecturer – a teacher in a university or college who has a lower rank than a professor: She’s a lecturer in the Psychology Department.instructor – someone who teaches a sport or a practical skill such as driving: Do you like your skiing instructor? My driving instructor taught me to parallel park.coach – someone who trains a person or team in a sport: The coach said we played well.
