lesson Meaning in the Cambridge English Dictionary
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Meaning of “lesson” in the English Dictionary

"lesson" in British English

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lessonnoun [C]

uk   us   /ˈles.ən/
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 givesFrench lessons.B2 an ​experience that ​teaches you how to ​behavebetter in a ​similarsituation in the ​future: There is a lesson for all ​parents in this ​tragicaccident. My ​parents made me ​pay back all the ​money and it was a lesson I never ​forgot. We can learnimportant lessons (= ​gain new ​understanding) from this ​disaster.
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(Definition of lesson from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"lesson" in American English

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lessonnoun [C]

 us   /ˈles·ən/
a ​period of ​time during which something is ​taught: Have you ​ever taken ​piano lessons? A lesson is also a ​usefulpiece of ​informationlearned through ​experience: Losing his ​job was a lesson he never ​forgot.
(Definition of lesson from the Cambridge Academic Content Dictionary © Cambridge University Press)
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