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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 ?
Measures Perception of the legitimacy of aggressive behavior. Participants answered three items adapted from Traclet et al.
Arthritis, spinal problems, sore muscles, gastrointestinal issues--there are numerous "invisible" conditions that can cause or contribute to a dog's aggressive behavior.
Results from a comparison study of three EDs indicated a significant decrease in aggressive behavior at two of three intervention sites (Gillespie, Gates, & Berry, 2013).
"This is important because research has shown that peer interventions are very effective at stopping bullying and preventing future aggressive behaviors. But these interventions are fairly rare.
Co-occurrence of aggressive behavior and depressive symptoms in early adolescence: A longitudinal multi-informant study.
Her essay begins with an overview of some of the theories of aggression and then looks at how these aggressive behaviors manifest in communication.
Results: Participants in the 'aggressive behavior' group had significantly different scores in the HCR-20 in the H1 (past violence events), H2 (violent events when young), H10 (disobedience in the past), and C4 (impulsiveness) sections; as well in the anti-social section of PCL-R; and significantly higher PANSS scores in the positive symptom, depressive symptoms and paranoid symptom sections than those in the 'non-aggressive behavior' group.
In addition to the contribution of different risk factors, social learning plays a fundamental role in originating and maintaining aggressive behavior (Vieira, Mendes, & Guimaraes, 2010; Widom, 2014).
The FDA believes that state-of-the-art behavioral treatments, such as positive behavioral support, and medications can enable health care providers to find alternative approaches for curbing self-injurious or aggressive behaviors in their patients.
Aggressive behavior can be comprehended as any behavior intended to inflict harm on someone or damage something (Berkowitz 1993; Dodge & Coie 1987).
Aggressive behavior is more common and stronger in early-school-age children, i.e.
Aggressive behavior in poultry--a major welfare concern in the egg production industry--increases stress, feather pecking, and bodily injury, which can lead to cannibalism.