Noun > Lecture
1 : a talk or speech given to a group of people to teach them about a particular subject
a lecture about/on politics
She’s planning to give/deliver a series of lectures on modern art.
Several hundred people are expected to attend the lecture.
2 : a talk that criticizes someone’s behavior in an angry or serious way
I came home late and got a lecture from my parents.
I gave her a lecture about doing better in school.