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English definition of “lesson”

lesson

noun [C] uk   /ˈles.ən/ us  
A1 a period of time in which a person is taught about a subject or how to do something: How can we make science lessons more interesting? She has never had/taken any acting lessons. He gives French lessons. B2 an experience that teaches you how to behave better in a similar situation in the future: There is a lesson for all parents in this tragic accident. My parents made me pay back all the money and it was a lesson I never forgot. We can learn important lessons (= gain new understanding) from this disaster.
(Definition of lesson from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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