instructor
n.a person whose job is to teach you a specific skill or sport. You might have an instructor for driving, swimming, or yoga.
n.a person who teaches a specific practical skill or physical activity. In North American academic contexts, it may also refer to a university teacher of a lower rank than a professor.
“The driving instructor is very patient with new students.”
“After three private sessions with the ski instructor, I finally felt confident enough to try the steeper slope.”
“While the lead professor designs the curriculum, the laboratory instructor is responsible for guiding students through the practical application of each experiment.”
Often used with a modifying noun to specify the field, such as 'fitness instructor' or 'flight instructor'.
From Latin instructor, equivalent to instruct + -or.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.