[1] : The Collaborative International Dictionary of English v.0.48

survival \surviv"al\, n. from survive.
   1. a living or continuing longer than, or beyond the
      existence of, another person, thing, or event; an
      outliving.
      1913 webster

   2. arhaeol.  ethnol. any habit, usage, or belief,
      remaining from ancient times, the origin of which is often
      unknown, or imperfectly known.
      1913 webster

            the close bearing of the doctrine of survival on the
            study of manners and customs.         --tylor.
      1913 webster

   survival of the fittest. biol. see natural selection,
      under natural.
      1913 webster survivance
see also:
survive survival of the fittest natural selection natural 

[2] : WordNet (r) 2.0

survival of the fittest
     n : a natural process resulting in the evolution of organisms
         best adapted to the environment syn: survival, natural
         selection, selection
see also:
survival natural selection selection 

Fittest >> F Words
Fittest, definition of term: Fittest
fittest_pag1.html

Survival >> S Words
Survival, definition of term: Survival
survival_pag1.html

Survival Of The >> S Words
Survival Of The, definition of term: Survival Of The
survival+of+the_pag1.html