The Collaborative International Dictionary of English v.0.48:

Immortal \Im*mor"tal\, a. [L. immortalis; pref. im- not +
   mortalis mortal: cf. F. immortel. See Mortal, and cf.
   Immortelle.]
   1. Not mortal; exempt from liability to die; undying;
      imperishable; lasting forever; having unlimited, or
      eternal, existance.
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            Unto the King eternal, immortal, invisible. --1 Tim.
                                                  i. 17.
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            For my soul, what can it do to that,
            Being a thing immortal as itself?     --Shak.
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   2. Connected with, or pertaining to immortality.
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            I have immortal longings in me.       --Shak.
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   3. Destined to live in all ages of this world; abiding;
      exempt from oblivion; imperishable; as, immortal fame.
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            One of the few, immortal names,
            That were not born to die.            --Halleck.
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   4. Great; excessive; grievous. [Obs.] --Hayward.
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   Immortal flowers, immortelles; everlastings.

   Syn: Eternal; everlasting; never-ending; ceaseless;
        perpetual; continual; enduring; endless; imperishable;
        incorruptible; deathless; undying.
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