The Collaborative International Dictionary of English v.0.48:
Deathless \Death"less\, a. Not subject to death, destruction, or extinction; immortal; undying; imperishable; as, deathless beings; deathless fame. [1913 Webster]WordNet (r) 3.0 (2006):
deathless adj 1: never dying; "his undying fame" [syn: deathless, undying]