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1.
(Can be used in other senses, but im just explaining this one)

From Doctor who.

Timelords have the ability to regenerate after severe trauma or natural wear and tear. Their body will under go a complete transformation, and although the same person remains, their appearance and personality changes. (In other words, where a human would die, a Timelord would just change, thereby healing any injury in the process.)However a Timelord only has the ability to do this 13 times. (Doesnt matter much to them, in one life they Usually live to about a thousand anyway. Notice I said usually.)
The Doctor: I'd like to see a butterfly fit into a chrysalis case after it spreads its wings.
Polly: Then you did change.
The Doctor: Life depends on change, and renewal.

Did you see the doctor after he regenerated?
by Meglomaniac April 25, 2007
 
3.
The super human ability to orgasm one second and grow another hard-on the next.
He regenerated and kept going and going and going even after he spuged. She was happy and peace rulled the planet again.
by grampa-p March 16, 2007
 
4.
To have sex and procreate..
Hell Hon when We Gunna Regenerate and have us a youngen..
by TadH August 28, 2008