From Longman Dictionary of Contemporary Englishoverstepo‧ver‧step /ˌəʊvəˈstep $ ˌoʊvər-/ verb (overstepped, overstepping) [transitive] 1 → overstep the limits/bounds/boundaries2 → overstep the mark→ See Verb table
Examples from the Corpus
overstep• Her friends and neighbors were angry at her because she had overstepped, given too much, offended them by excess.• The state Court of Criminal Appeals overruled the hearing, however, declaring that Brown had overstepped his authority.• Following his inauguration for a second term, Roosevelt immediately overstepped his mandate.• The parliamentarians hit back by accusing Mr Obasanjo of overstepping his powers and showing dictatorial tendencies.• A military commander may overstep the bounds of constitutionality, and it is an incident.• Thomas, obedient to codes of privacy, didn't want to overstep the line.• The preacher overstepped the mark when he called the Royal Mail to a halt on the moor near Bagshot.• The imperial authorities fully exploited and sometimes overstepped their constitutional powers: there were imperial laws for everything. 