Meaning of “lecture” - Learner’s Dictionary

lecture

verb uk us /ˈlektʃər/
TEACH [ I ]

to give a formal talk to a group of people, often at a university:

She travelled widely throughout North America lecturing on women's rights.
For ten years she lectured in law.
CRITICIZE [ T ]

to talk angrily to someone in order to criticize their behaviour:

Stop lecturing me!
His parents used to lecture him on his table manners.

(Definition of “lecture verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)