Survival /(?)/

Sur·viv·al

Survival

n.
  1. A living or continuing longer than, or beyond the existence of, another person, thing, or event; an outliving.
  2. Any habit, usage, or belief, remaining from ancient times, the origin of which is often unknown, or imperfectly known. (Arhaeol. & Ethnol.)
    The close bearing of the doctrine of survival on the study of manners and customs.
    — Tylor.

Phrases & Compounds
Survival of the fittest
See Natural selection, under Natural.