Meaning of Death
Death is the shifting of your conciousness of being from this physical plane to a metaphysical one.
In other words, transfer of the soul from the world as we know it to heaven/nirvana, purgatory, hell/gehenna, and, depending on your religious beliefs, a variety of other names for the possible destination points.
Since, whether we like it or not, everyone dies, it is just as natural birth. Birth brings our conciousness into this world, and death takes our conciousness out. The meaning of death is simply to end this journey we call life, the 'train we board' to take us to the next stage of existence, I suppose. It is simply a matter of when and how.