'Generation' in the Bible

And the captain of the unsexed servants said to Daniel, I am in fear of my lord the king, who has given orders about your food and your drink; what if he sees you looking less happy than the other young men of your generation? then you would have put my head in danger from the king.

How great are his signs! and how mighty are his wonders! his kingdom is an everlasting kingdom, and his dominion is from generation to generation.

And at the end of the days I Nebuchadnezzar lifted up mine eyes unto heaven, and mine understanding returned unto me, and I blessed the most High, and I praised and honoured him that liveth for ever, whose dominion is an everlasting dominion, and his kingdom is from generation to generation: