Antisocial

[Sarah]

Tending to interrupt or destroy social intercourse; averse tosociety, or hostile to its existence; as, antisocial principles.

[Sarah]

A term used to describe people exibiting any sort of behavior in which the intent is to violate the rights of others and otherwise going against society. Examples include murder, bullying, robbery, conning, and rape.
Often confused with [asocial] which is used to describe people who are shy, introverted, or otherwise avoid socializing or social situations.

[Sarah]

A word commonly confused with asocial.
Asocial means simply not being social (it does not imply hatred or negativity, only absence), while antisocial insinuates an active hostility or contempt for society as a whole.

[Sarah]

Often confused with [asocial], which is very different; asocial means one who seeks to avoid society, somebody who refuses to or cannot socialize with others, like someone on the [autism] spectrum.
Antisocial means against

[Vania]

Antisocial is a term in psychology for people with [antisocial personality] disorders who have a pattern of disregard and violation for people. In order to be labeled antisocial, there is a set of indicators which can be seen on the DSM Versions, (Diagnostic Statistical Manual-- currently on the 5th version) a book containing mental disorders and their indicators.
Commonly mistaken with the term asocial which generally pertains to people who are [socially withdrawn]. Antisocial people may have [asocial] tendencies, though the former is in a much greater degree, as the person can progress to criminal acts such as - theft, murder and others.
*** other people and dictionaries are putting not social-- or shy and withdrawn, most probably because of the prefix - anti, though widely acceptable in the general population (or mostly used- and interpreted that way), it might cause confusion- and sometimes distrust from people who knows the real difference. (I mean- if you refer to yourself as antisocial youre basically portraying yourself as a dangerous person, well your preference really.)

[Kai]

Main Entry: Antisocial
Function: adjective
Date: 1797
*anti - against, opposite, instead of
1: unwilling or unable to conform to normal standards of social behavior
2: shunning contact with others
Synonyms: eremitic, introverted, [misanthropic], reserved, [standoffish]
Antonyms: [affable], friendly, outgoing, social

[Tariq Zaki]

Contrary to the laws and customs of society; devoid of or antagonistic to sociable instincts or practices.