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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 ?
Play aggression among Zapotec children: Implications for the practice hypothesis.
Cats engaging in play aggression often demonstrate characteristic body postures, such as tail-lashing and flattening of the ears against the head, followed by hiding/stalking and biting of the hands and feet of people in their vicinity.
Management of cats engaging in inappropriate play aggression usually involves the use of techniques to distract/deter the offending kitty without making physical contact with him immediately upon the onset of the unwanted behavior.