A lesson would be a specific learning activity happening at a specific place and time, administered by a person more knowledgeable than you; like a teacher or mentor "giving a lesson".

If you're fine with the generalized form "learned a lesson", then surely "learnings" is fine too. There's no point in trying to police a completely normal and sensible use of language.

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esafak 7 hours ago | parent [-]

So when you cause an incident because you did not pay attention and "learn your lesson" who's the mentor?

	▲	tskj 4 hours ago \| parent [-]
		The universe. Anyway, I accept this usage of the word "lesson", so I also accept "learnings". My point was one of hypocrisy, not policing people in how they can use the word "lesson".