Dictionary
Words, grammatical forms and meanings linked to the ontology.
overstep the mark en · VERB
Meanings
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(idiomatic) To behave in an unacceptable or morally reprehensible way.
"If Russia mobilises, it is for defence. No nation in the world would dream of attacking Germany, nor has Germany the slightest intention of imperilling her coming supremacy amongst the nations by such crude methods as military enterprise. Servia must be punished, naturally, but to that, in principle, every nation in Europe is agreed. We shall not permit Austria to overstep the mark."
1920, Edward Phillips Oppenheim, The Great Impersonation, Chapter 25:
Forms
Synonyms
cross the line · go too far