kin selection: Meaning and Definition of

kin' selec"tion

Pronunciation: [key]
— Biol. Biol.
  1. a form of natural selection that favors altruistic behavior toward close relatives resulting in an increase in the altruistic individual's genetic contribution to the next generation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.