noun

open resistance; bold disobedience.

an act of defiance

resistance,opposition,confrontation,non-compliance,disobedience,insubordination,dissent,recalcitrance,subversion,subversiveness,rebelliousness,mutinousness,provocation,daring,boldness,temerity,audacity,bravado,aggression,contempt,disregard,scorn,insolence,truculence,contumacy