antisocial UK /ˌæntiˈsəʊʃəl/US /ˌæntiˈsoʊʃəl/adjective 3noun 1forms 3 adjective3 •Unwilling or unable to cooperate and associate normally with other people. •Antagonistic, hostile, or unfriendly toward others; menacing. •Opposed to social order or the principles of society; hostile toward society. noun1 •An antisocial individual. formsantisocials · more antisocial · most antisocial