The American Heritage® Dictionary of the English Language, 4th Edition
n. The study of the biological determinants of social behavior, based on the theory that such behavior is often genetically transmitted and subject to evolutionary processes.
n. The science that applies the principles of evolutionary biology to the study of social behaviour in both humans and animals
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the branch of biology that conducts comparative studies of the social organization of animals (including human beings) with regard to its evolutionary history
Word Usage
"He even coined the term sociobiology to describe the field that he was opening up—namely the study of the social behavior of animals and humans and how this is related to genetics, early experience, and the survival of species."