'Learned' in the Bible

I applied my mind to know wisdom and knowledge, madness and folly; I learned that this too is a pursuit of the wind.

Furthermore, though they never saw the sun nor learned anything, they are more content than the other.

For what advantage has the wise man over the fool [for being worldly-wise is not the secret to happiness]? What advantage has the poor man who has learned how to walk [publicly] among the living [with men’s eyes on him; for being poor is not the secret to happiness either]?

Moreover, besides being wise himself, the Teacher taught people what he had learned by listening, making inquiries, and composing many proverbs.