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encroach (up)on (something)

To approach or cross a literal or figurative boundary. That fool next door totally encroached upon my land when he built his new fence. I'm sorry, I didn't mean to encroach on your authority by assigning work to your interns.
See also: encroach

encroach (up)on someone or something

to infringe or trespass on someone or something; to move into the space belonging to someone or something. (Upon is formal and less commonly used than on.) I did not mean to encroach upon your property. I need lots of space. Don't encroach on me.
See also: encroach, on

encroach on

or encroach upon
To advance or extend toward or into something beyond its proper or former limits: The weeds in my neighbor's yard are encroaching on my lawn. At the edge of the village, the desert encroaches upon grassland.
See also: encroach, on
References in periodicals archive ?
The Apex court had also asked the survey team to monitor the six mines on the Andhra-Karnataka border - three of which belong to the Reddys - to check whether or not they encroach on forestland.
The improvements could include creating a retention basin for storm runoff and straightening Division Street, work that could encroach on where the district wants to build the campus.
San Francisco-based Presidio Chatsworth Partners LLC last year reduced the number of proposed homes in the project from 484 to 388, but many maintain that the development would still clog local streets, encroach on horse-riding areas and detract from the semirural nature of the area.
The Board of Supervisors on Tuesday unanimously demanded a zoning code change to prevent construction of houses that cover entire lots and encroach on neighborhood privacy and views.
It has become common sight in all the markets in the capital city that shopkeepers encroach upon pavements in front of their shops while vendors set up stalls on roads.