trans ‧ gress /trænzˈɡres $ træns-/ BrE AmE verb [intransitive and transitive] formal
[ Date: 1400-1500 ; Language: French ; Origin: transgresser , from Latin , past participle of transgredi 'to step beyond' , from gredi 'to step' ]
to do something that is against the rules of social behaviour or against a moral principle:
Orton’s plays transgress accepted social norms.
—transgressor noun [countable]
—transgression /-ˈɡreʃ ə n/ noun [uncountable and countable]