Source : Webster's Revised Unabridged Dictionary (1913)

Euthanasia \Eu`tha*na"si*a\n. [NL., fr. Gr. ?; ? well + ? death,
   ?, ?, to die: cf. F. euthanasie.]
   An easy death; a mode of dying to be desired. ``An euthanasia
   of all thought.'' --Hazlitt.

         The kindest wish of my friends is euthanasia.
                                                  --Arbuthnot.

Source : WordNet®

euthanasia
     n : the act of killing someone painlessly (especially someone
         suffering from an incurable illness) [syn: {mercy killing}]