behaviour in WordNet English dictionary

1. manner of acting or controlling yourself
   behavior  behaviour  conduct  doings 
   
2. (psychology) the aggregate of the responses or reactions or movements made by an organism in any situation
   behavior  behaviour 
   
3. (behavioral attributes) the way a person behaves toward other people
   demeanor  demeanour  behavior  behaviour  conduct  deportment 
   
4. the action or reaction of something (as a machine or substance) under specified circumstances
   "the behavior of small particles can be studied in experiments"
   behavior  behaviour 
   

behaviour in English Wiktionary