|1.||an attack or harmful action, esp an unprovoked attack by one country against another|
|2.||any offensive activity, practice, etc: an aggression against personal liberty|
|3.||psychol a hostile or destructive mental attitude or behaviour|
|[C17: from Latin aggression-, from aggrēdi to attack]|
aggression ag·gres·sion (ə-grěsh'ən)
Hostile or destructive behavior or actions.
|aggression (ə-grěsh'ən) Pronunciation Key
Behavior that is meant to intimidate or injure an animal of the same species or of a competing species but is not predatory. Aggression may be displayed during mating rituals or to defend territory, as by the erection of fins by fish and feathers by birds.