learn one's lesson

learn one's lesson (third-person singular simple present learns one's lesson, present participle learning one's lesson, simple past and past participle learned one's lesson or learnt one's lesson)

1. (figuratively) To learn to avoid repeating a mistake.

• “learn your lesson” (US) / “learn your lesson” (UK) in Macmillan English Dictionary.
• “learn one's lesson”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “learn a your lesson”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.