teacher
[C] Countable
pl: teachers
The word carries a strong association with authority and mentorship, typically evoking a classroom setting. While it refers to a professional role, it also implies a relationship of guidance and knowledge transfer between an expert and a novice. In casual conversation, the term can be used broadly to describe anyone who provides a lesson, regardless of certification. However, in a formal or legal context, it specifically denotes a licensed professional employed by an educational institution.
Countable because you can count individual people who hold the job, such as three teachers in a staff room.
Meanings
Noun
[someone]
A person whose occupation is to instruct others, especially in a school.
"The history teacher explained the causes of the war."