I actually didn’t know the precise definition of the term, for all it’s become an eponymous meme, itself, thanks to the Internet. Then I happened to be pointed to this fascinating video lecture by Susan Blackmore over at TED.com. She not only defined the term, she placed it in a very important place in our development as a species, and went on to describe what she sees as the next, inevitable step.
Fascinating stuff. You should give it a view.