A solid with
atoms so dense and compact that basic physics shows that it cannot be
condensed further. However the existance of this is questionable as every bit of matter we have ever discovered can be condensed. (Which includes
stars,
black holes, etc.) Having so much density means that it would also weigh an incredible ammount and be so hot that not matter what it is, it would
evaporate and destroy everything within a huge radius almost instantly. It can also be used to over-exaggerate something.
