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.