Definition of: immortal

(i·môr′təl) adjective
Having unending existence; deathless; enduring.
—noun
1. A person considered worthy of immortality.
2. In mythology, a god.
—the Immortals
1. The members of the French Academy, forty in number: also called the Forty Immortals.
2. The royal guard of ancient Persia; hence, any band or group that has conducted itself with marked gallantry in the face of extraordinary perils (especially of war). [<L immortalis]
—im·mor′tal·ly adverb Synonyms (adjective): deathless, endless, eternal, everlasting, imperishable, incorruptible, indestructible, indissoluble, never-dying, never-fading, never-failing, sempiternal, undying, unfading, unfailing. See ETERNAL. Antonyms: dying, ephemeral, fading, failing, fleeting, mortal, perishable, perishing, transient, transitory.