'Lucifer', in Christianity, Lucifer means the falling angel of the devil.
" A selfish heart, persevering love, wrongly threatened and repeatedly revolving appearance of an angel and devil, lovers having a vague feeling in Lucifer" "The meaning of religion is to have courage".
Shinee's main song for their 2nd album, LUCIFER
so freaking chim, but i like the coolness and its deep meaning :)
btw, i only remember LUCIFER as the bad black cat in cinderalla movie from disney. :P