Behaviors that cause psychological or physical harm to another individual.

A deluded mental factor that is an increase of the root delusion anger that wishes to hurt or harm others physically or verbally. See Understanding the Mind

1610s, "unprovoked attack," from French aggression (16c.), from Latin aggressionem (nominative aggressio) "a going to, an attack," noun of action from past participle stem of aggre [..]

a disposition to behave aggressively a feeling of hostility that arouses thoughts of attack violent action that is hostile and usually unprovoked the act of initiating hostilities deliberately unfrien [..]

n. An unprovoked attack.

The action of attacking another person or country.

noun. when one's actions are influenced by feelings of competition, rage, or violence, thereby producing injury to, or the deterioration or conquering of people, sometimes, one's own self. W [..]

agresiye

In the Quantitative Coding System there are 8 subclasses to aggression: 4 refering to verbal agression and 4 refering to physical aggression. See also: Friendliness   

Let's be really simple with this term...aggression is any form of behavior that is intended to harm or injure some person, oneself, or an object.

(n) a disposition to behave aggressively(n) a feeling of hostility that arouses thoughts of attack(n) violent action that is hostile and usually unprovoked(n) the act of initiating hostilities(n) [..]

An unprovoked attack made by an animal.

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)

Behavior which may be manifested by destructive and attacking action which is verbal or physical, by covert Attitudes of Hostility or by obstructionism.

The use of force to achieve a goal; emotionally, often involves the use of control, "power over" others, or an attempt to hurt or destroy others.

A form of behavior which leads to self-assertion; it may arise from innate drives and/or a response to frustration; may be manifested by destructive and attacking behavior, by covert attitudes of host [..]

Behavior that is related to conflict between individuals; includes both threats and attacks.

A side effect of presenting aversive stimuli or removing positive reinforcers, which may generate responses that injure other organisms (e.g., biting) and/or increase the effectiveness with which oppo [..]

Cats that are aggressive can be very dangerous and veterinary advice should be sought if a cat is persistently aggressive towards people. There are many different causes of aggressive behaviour rangin [..]

A form of behaviour which leads to self-assertion; it may arise from innate drives and/or a response to frustration; may be manifested by destructive and attacking behaviour, by covert attitudes of hostility and obstructionism, or by healthy self-expressive drive to mastery. (12 Dec 1998)

aggression