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