The first attack, or act of hostility; the first act of injury, or first act leading to a war or a controversy; unprovoked attack; assault; as, a war of aggression. "Aggressions of power."

Anger or aggression is a key emotion necessary to our personal survival in our environment. In psychology it is understood from a biological point of view. The hormonal hypothesis regards aggression suggests that the male sex hormone androgen (testosterone) plays its part. As do other hormones such as adrenaline and progesterone (Kreuz and Rose, 1972). Our environment also plays its part. There are links between alcohol consumption and aggression, the weather and aggression, and environmental stressors and aggression (Keegan, 2002).

Initiating and acting with hostile behaviors. A behavior aimed at causing either physical or psychological pain by biting, hitting, and /or throwing objects.(one's anger, one is)

The Definition of Aggression was a definition of the term "aggression" adopted by the United Nations General Assembly on December 14, 1974. The definition was adopted without a vote during the General Assembly's 2319th plenary meeting and attached as an annex to http://daccess-ods.un.org/access.nsf/Get?Open&DS=A/RES/3314(XXIX)&Lang=E&Area=RESOLUTION General Assembly Resolution 3314 (XXIX). Although often cited in opposition to military actions, it has no binding force in international law.

Taming aggression with Amphetamines One free bite is not enough Fighting Alpha is not a four letter word How to keep aggression under control No excuse for growlers Why Dogs Bite Aggression between dogs It's All the Rage

used for expressing displeasure, demonstrating that another male can't protect a female, social control (mobbing), males managing relations among females

One of the seven modes. Its positive pole is dynamism; its negative pole is belligerence. In aggression mode, one releases one's energy vigorously.

in sport, intention to dominate others forcefully.

In the game of poker, opens and raises are considered aggressive plays, while calls and checks are considered passive (though a check-raise would be considered a very aggressive play). It is said that "aggression has its own value", meaning that often aggressive plays can make money with weak hands because of bluff value. Aggressive plays also tend to give the opponents more opportunities to make mistakes.

a disposition to behave aggressively

a number which measures how aggressive a race is