What is death? When I breathe my last breath? When my heart ceases to beat? When my last brain cell resigns in defeat?
When am I dead? When I no longer need to be fed? When my body’s as hard as lead? When I’m no longer in my head? When there’s no more dread? When my words are no longer read, or said? Is that dead?
Is this dead? source 
Angel of Death. source