a. The actions or reactions of a person or animal in response to external or internal stimuli.
b. One of these actions or reactions: a hormone . . . known to directly control sex-specific reproductive and parenting behaviors in a wide variety of vertebrates(Thomas Maugh II).
3. The manner in which something functions or operates: the faulty behavior of a computer program; the behavior of dying stars.
[Middle English behavour, from behaven, to behave (on the model of havour, behavior, from Old French avoir, from avoir, to have); see behave.]
Synonyms: behavior, conduct, deportment These nouns all pertain to a persons actions as they constitute a means of evaluation by others. Behavior is the most general: The children were on their best behavior. Conduct applies to actions considered from the standpoint of morality and ethics: Life, not the parson, teaches conduct (Oliver Wendell Holmes, Jr.) Deportment more narrowly pertains to actions measured by a prevailing code of social behavior: [Old Mr. Turveydrop] was not like anything in the world but a model of Deportment (Charles Dickens).
1. The actions displayed by an organism in response to its environment.
2. One of these actions. Certain animal behaviors (such as nest building) result from instinct, while others (such as hunting) must be learned.
3. The manner in which a physical system, such as a gas, subatomic particle, or ecosystem, acts or functions, especially under specified conditions.
behavior /bhevyr/ n. [U] a way of acting: She refused to work closely with anyone and was fired for bad behavior.