lecture
US /ˈlek.tʃɚ/
UK /ˈlek.tʃɚ/

1.
an educational talk to an audience, especially one of students in a university
:
•
The professor gave a fascinating lecture on ancient history.
•
Students are required to attend all lectures.
2.
a long, serious, and often critical talk given to someone to tell them that their behavior is wrong
:
•
My parents gave me a long lecture about being responsible.
•
The coach gave the team a stern lecture after their poor performance.
1.