Definitions for "Survival of the fittest"
Natural selection. A process whereby those best equipped for the conditions in which they are found survive and pass their genetic material on to the next generation.
The process through which the best-adapted members of a species survive so that they can breed and thereby perpetuate themselves (attributed to Charles Darwin).
the concept of natural selection that states that the fittest survive and spread their traits through a population.
Ethics based on individualism (shape of egoism, also called 'powerthinking').