LESSON

[noun] [C] - a period of time in which a person is taught about a subject or how to do somethingHow can we make science lessons more interesting?She has never taken acting lessons.A lesson can also be a useful piece of information learned through experience.We can learn/draw important lessons from this disaster.There is a lesson for all parents in this tragic case of child death.to punish someone so that they will not repeat what they have doneShe decided to teach the boy a lesson.