Unwilling or unable to associate in a normal or friendly way with other people; not sociable. adjective
He was considered antisocial because he rarely attended social gatherings.
Her antisocial behavior made it difficult for her to make friends.
Contrary to the laws and customs of society; devoid of or antagonistic to sociable instincts or practices. adjective
The vandalism was described as an antisocial act.
Antisocial behavior can include actions like littering or graffiti.
Relating to or characteristic of a personality disorder marked by antisocial behavior. adjective
The psychologist diagnosed him with antisocial personality disorder.
Antisocial personality disorder is often associated with a disregard for the rights of others.