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1an amount of teaching given at one time; a period of learning or teaching:an advanced lesson in math a driving lesson a thing learned or to be learned by a student. a thing learned by experience:the tragedy is a lesson in disappointment an occurrence, example, or punishment that serves or should serve to warn or encourage:let that be a lesson to you! 2a passage from the Bible read aloud during a church service, especially either of two readings at morning and evening prayer in the Anglican Church.
verb [with object] archaic
instruct or teach (someone). admonish or rebuke (someone).