Source : Webster's Revised Unabridged Dictionary (1913)

Survivor \Sur*viv"or\, n.
   1. One who survives or outlives another person, or any time,
      event, or thing.

            The survivor bound In filial obligation for some
            term To do obsequious sorrow.         --Shak.

   2. (Law) The longer liver of two joint tenants, or two
      persons having a joint interest in anything. --Blackstone.

Source : WordNet®

survivor
     n 1: one who lives through affliction; "the survivors of the fire
          were taken to a hospital" [syn: {subsister}]
     2: one who outlives another; "he left his farm to his
        survivors"
     3: an animal that survives in spite of adversity; "only the
        fittest animals were survivors of the cold winters"