Pronunciation: (bi-hāv'yur), [key]
1. manner of behaving or acting.
2. Psychol., Animal Behav.
a. observable activity in a human or animal.
b. the aggregate of responses to internal and external stimuli.
c. a stereotyped, species-specific activity, as a courtship dance or startle reflex.
3. Often, behaviors. a behavior pattern.
4. the action or reaction of any material under given circumstances: the behavior of tin under heat. Also, esp. Brit.,behaviour.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.