'This Generation' in the Bible

To what therefore shall I compare the men of this generation? who are they like?

for as the case of Jonas was a miraculous instance to the Ninevites, so shall the son of man be to this generation.

the queen of the south shall rise up in the day of judgment against this generation, and condemn it: for she came from the remote parts of the earth to hear the wisdom of Solomon; but now, a greater than Solomon is here.

" so that the blood of all the prophets, which has been shed since the creation of the world, may be required of this generation,

from the blood of Abel to that of Zacharias, who perished between the altar and the temple: yes, I assure you, this generation shall be responsible for it all.

but before this, he must undergo many sufferings, and be rejected by this generation:

I tell it you for certain, this generation shall not pass away, till all these things are accomplished.