de ‧ fi ‧ ance /dɪˈfaɪəns/ BrE AmE noun [uncountable]
behaviour that shows you refuse to do what someone tells you to do, especially because you do not respect them ⇨ defy
act/gesture of defiance
Running away was an act of defiance against his parents.
in defiance (of something)
Many people were drinking in the streets, in flagrant defiance of the ban.
Her fists clenched in defiance.