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Definition of Aggression

Babylon English

hostile behavior; attack, offensive
Aggression Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
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."
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

\ag*gres"sion\ (&?;), n. [l. aggressio, fr. aggredi: cf. f. agression.] 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."

for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America
An unprovoked attack.
Concise English-Irish Dictionary v. 1.1
WordNet 2.0

1. a disposition to behave aggressively
(hypernym) unfriendliness
2. a feeling of hostility that arouses thoughts of attack
(synonym) aggressiveness
(hypernym) hostility, enmity, ill will
3. violent action that is hostile and usually unprovoked
(synonym) hostility
(hypernym) action
(hyponym) meat grinder
(derivation) attack, aggress
4. the act of initiating hostilities
(hypernym) combat, armed combat
(part-holonym) war, warfare
(derivation) attack, aggress
5. deliberately unfriendly behavior
(hypernym) behavior, behaviour, conduct, doings
(hyponym) aggravation, irritation, provocation
Aggression Definition from Social Science Dictionaries & Glossaries
Glossary of Significant Concepts in Parental Acceptance-Rejection Theory
Any behavior where there is the intention of hurting someone, something, or oneself. It is differentiated into physical, verbal, and symbolic forms. Physical aggression includes hitting, biting, pushing, shaking, pinching, scratching, burning, tying up, and the like. Verbal aggression, on the other hand, includes sarcasm, belittling, cursing, scapegoating, denigrating, and saying other thoughtless, unkind, cruel things to or about the person. Symbolic aggression includes the use of angry or rude hand gestures or facial expressions. Aggression is to be distinguished from assertiveness. (See hostility; personality theory; problems with the management of hostility and aggression; the warmth dimension of parenting
Dream Interpretation & Dream Theories
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
Aggression Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Aggression is overt, often harmful, social interaction with the intention of inflicting damage or other unpleasantness upon another individual. It is a virtually universal behavior among animals. It may occur either in retaliation or without provocation. In humans, frustration due to blocked goals can cause aggression. Submissiveness may be viewed as the opposite of aggressiveness.

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Aggression Definition from Society & Culture Dictionaries & Glossaries
Social Work in Canada
Any form of behaviour that is intended to harm or injure some person, oneself, or an object.
Aggression Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
Aggression Definition from Medicine Dictionaries & Glossaries
Dictionary of Medicine (Shahram)
state of feeling violently angry towards someone, something