immortal adj.  living or lasting forever, or fig. very special and famous and
                        therefore likely to be remembered for a long time 
The Greek gods were immortal and so could not die.
The Catholic priest warned him he was endangering his immortal soul.

immortal noun [C] 
The Greek and Roman gods were called the immortals. 

immortality noun [U] 

immortalize, British and Australian usually -ise  verb [T] 
If someone or something is immortalized, they become so famous that they are remembered
 for a long time after they are dead. 
Marlene Dietrich was immortalized for millions of people through her roles in films like
 'The Blue Angel'.

This page is cited from Cambridge Dictionaries Online. For the original, please visit
http://dictionary.cambridge.org/define.asp?key=immortal*1+0