trespass on

trespass (up)on something

to intrude or encroach onto a restricted or private area. (Upon is formal and less commonly used than on.) You had better not trespass upon Mr. Green's land. I wouldn't trespass on that fenced-off land!
See also: on, trespass

trespass on

v.
1. To enter wrongfully onto some land that belongs to another: We don't tolerate hunters who trespass on our property.
2. To infringe on something, such as another's privacy, time, or attention: Do not trespass on their patience by pursuing this matter any further.
See also: on, trespass
References in classic literature ?
Mr Allworthy had given the fellow strict orders, on pain of forfeiting his place, never to trespass on any of his neighbours; no more on those who were less rigid in this matter than on the lord of this manor.
He was as good as his word: for he rode immediately to his house, and complained of the trespass on his manor in as high terms and as bitter language as if his house had been broken open, and the most valuable furniture stole out of it.
I am compelled to trespass on your ladyship's attention for a few minutes more," he answered.
We can't know," replied Tarzan, "and the chances are that the very place we are seeking is the place they don't wish us to trespass on.
I will only trespass on your kindness to tell me if I have succeeded in making myself understood.
The Stay Safe campaign also hits out at adults who fail to recognise that their trespass leaves holes in fences for children to gain access and at those who post material encouraging trespass on the web.