Definition of "immortal"

immortal

/ɪˈmɔɹtəl/

adjective
not comparable
1. Not susceptible to death; living forever; never dying.
2. Never to be forgotten; that merits being always remembered.
3. Connected with or relating to immortality.
  Quotations
  I have immortal longings in me.
  c. 1606–1607, William Shakespeare, “The Tragedie of Anthonie and Cleopatra”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene ii]
4. (obsolete) Exceedingly great; excessive; grievous.
  Quotations
  immortal and mercyless butchery
  1603, John Hayward, The Right of Succession Asserted
noun
plural immortals
1. One who is not susceptible to death.
2. A member of an elite regiment of the Persian army.
3. A member of the Académie française.
4. (Internet) An administrator of a multi-user dungeon.
  Quotations
  Tazmania/Middle Sphere is in need of builders, admin, and immortals. […] Immortals do not need experiance[sic].
  1999, Corey Crawford, “RECRUITING: [circle] Tazmania/Middle Sphere: Admin, Builders, Immortals”, in rec.games.mud.announce (Usenet)