[metmom]

It means both born again and born from above.

Here’s a link to a page showing the Greek.
http://biblehub.com/text/john/3-3.htm

Here’s a link to Strong’s for the Greek word *anothen*.
http://biblesuite.com/greek/509.htm

[Just mythoughts]

Why do those that claim Christ said something He did not, stop reading the instruction given to read with comprehension the instruction?

Only those ‘children’ who take this flesh journey will have opportunity to ‘see’ the kingdom of God. Those fallen angels nor the devil will take this flesh journey and none of them will exist long enough to see the kingdom of God.

The word ‘again’ in the sense of a ‘rebirth’ spirit or otherwise as was Nicodemus understanding is not what Christ was teaching.

I find it most curious given the first utterance made by Nicodemus to Christ in secret had nothing to do with the subject instruction given by Christ. There is a lesson here but it is not the doctrine of Nicodemus.

[verga]

Your own source shows it as a tertiary meaning. If Jesus had truly meant "again" then why didn't He say "palin" which actually means again:

Link to Bible hub Matt 27:50