What does « ʿaṣr » mean in the Quran?

Would one of you like to have a garden of palm trees and grapevines underneath which rivers flow in which he has from every fruit? But he is afflicted with old age and has weak offspring, and it is hit by a whirlwind containing fire and is burned. Thus does Allah make clear to you [His] verses that you might give thought.

And there entered the prison with him two young men. One of them said, "Indeed, I have seen myself [in a dream] pressing wine." The other said, "Indeed, I have seen myself carrying upon my head [some] bread, from which the birds were eating. Inform us of its interpretation; indeed, we see you to be of those who do good."

Then will come after that a year in which the people will be given rain and in which they will press [olives and grapes]."

And sent down, from the rain clouds, pouring water

By time,