o ‧ ver ‧ step /ˌəʊvəˈstep $ ˌoʊvər-/ BrE AmE verb ( past tense and past participle overstepped , present participle overstepping ) [transitive]
1 . overstep the limits/bounds/boundaries to do something that is not acceptable or allowed:
He has overstepped the bounds of acceptable behaviour.
2 . overstep the mark to offend someone by doing or saying things that you should not do or say:
She overstepped the mark and lost her job.