Origin: 1375–1425;behave + -ior (on model of havior, variant of havor < Middle French (h)avoir ≪ Latinhabēre to have); replacing late Middle Englishbehavoure, behaver. See behave, -or1
Synonyms 1. demeanor, manners; bearing, carriage. Behavior, conduct, deportment, comportment refer to one's actions before or toward others, especially on a particular occasion. Behavior refers to actions usually measured by commonly accepted standards: His behavior at the party was childish.Conduct refers to actions viewed collectively, especially as measured by an ideal standard: Conduct is judged according to principles of ethics.Deportment is behavior related to a code or to an arbitrary standard: Deportment is guided by rules of etiquette. The teacher gave Susan a mark of B in deportment.Comportment is behavior as viewed from the standpoint of one's management of one's own actions: His comportment was marked by a quiet assurance.