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Unjustified planned, threatened, or carried out use of force by one nation against another.

The key word in the definition of aggression is "unjustified"—that is, in violation of International Law, treaties, or agreements. It was the basic charge leveled against Nazi Germany at the Nuremberg Trials in 1946.


noun aggressiveness, antagonism, assault, attack, bellicosity, belligerence, belligerency, besiegement, combativeness, contentiousness, drive, enterprise, fight, foray, hostility, hustle, illapse, infringement, initiative, injury, inroad, intrusion, irruption, jingoism, martiality, militancy, offense, onset, onslaught, outbreak, provocation, pugnacity, push, pushiness, raid, sally, sortie, storming, transgression, unprovoked attack, warlikeness
See also: assault, belligerency, foray, incursion, infringement, intrusion, invasion, offense, onset, outbreak, provocation
References in periodicals archive ?
Aggressive behavior in chickens is a threat to their health.
There is little evidence of an optimum mixing time to minimize aggressive behavior of pigs.
This result proves that prosocial behavior has a significant effect on aggressive behavior.
Another consequence of chronic aggressive behavior is the detrimental effect on physical health.
In contrast, when individuals are aware of their feelings and the causes underlying these feelings, and control their feelings, they are less likely to display aggressive behavior (Underwood, Coie & Herbsman, 1992).
For each of the items, participants were required to respond on a 4-point scale, indicating if the particular aggressive behavior was very wrong (0), a bit wrong (1), a bit OK(3).
4) In a study of alcoholic impulsive offenders with antisocial personality disorder, aggressive behavior was found to be related to depressed cerebrospinal fluid (CSF) serotonin levels.
Deficiencies in the essential fats eicosa-pentaenoic acid (EPA), and especially, docosahexaenoic acid (DHA), which is a crucial component of brain cell membranes, are associated with aggressive behaviors and impulse-control problems in numerous human populations.
Aggressive behavior can have serious consequences for persons with dementia as well as their caregivers.
Christopher Ferguson, a psychologist at Texas A&M International University, looked at 25 published studies on the link between video games and measures of aggressive behavior.
Jonathan Pangilinan, 13, a seventh-grader at Iron Horse Middle School, says that violent video games usually do not cause aggressive behavior.
Meanwhile and thereafter, the 78-year old woman's aggressive behavior and instability continued to escalate until a decision was made to send her to a geriatric-psychiatric unit at the local hospital for evaluation.