'Generation' in the Bible

These are the records of the generations (family history) of Noah. Noah was a righteous man [one who was just and had right standing with God], blameless in his [evil] generation; Noah walked (lived) [in habitual fellowship] with God.

And the LORD said unto Noah, Come thou and all thy house into the ark; for thee have I seen righteous before me in this generation.

But in the fourth generation they shall come hither again: for the iniquity of the Amorites is not yet full.

I'm establishing my covenant between me and you, and with your descendants who come after you, generation after generation, as an eternal covenant, to be your God and your descendants' God after you.

God continued to speak to Abraham, "You and your descendants who are born in the future are to keep my covenant that is, you and your descendants, generation after generation.

Generation after generation, every male among you is to be circumcised on the eighth day after his birth, including the servant born in your house or the one purchased from a foreigner, who is not of your offspring.

And Joseph saw Ephraim's children of the third generation: the children also of Machir the son of Manasseh were brought up upon Joseph's knees.