Definition of “instruct” - Learner’s Dictionary

instruct

verb [ T ] uk us /ɪnˈstrʌkt/
ORDER

to officially tell someone to do something:

[ + to do sth ] Staff are instructed not to use the telephones for personal calls.
TEACH formal

to teach someone about something:

She is there to instruct people in the safe use of the gym equipment.

(Definition of “instruct” from the Cambridge Learner's Dictionary © Cambridge University Press)