Collocations for boundary - noun

common
northern, southern, etc.
national, state
territorial
district, parish (esp. BrE)
geographic (esp. AmE), geographical

have
form, mark
The river forms the boundary.

share
draw, establish, fix, set
The boundary was fixed just south of the farm.

redraw

fence, hedge (esp. BrE), line, wall
dispute
a boundary dispute between Brazil and Paraguay

across the boundary, over the boundary
They drove across the boundary.

along the boundary
We continued along the southern boundary of the county.

at the boundary, on the boundary
We had to stop at the boundary.
on the boundary of the two countries

beyond the boundary
She had never strayed beyond the city boundaries.

within the boundarys
within the boundaries of the old city walls

boundary between
the boundary between Sussex and Surrey

boundary with
The state has a boundary with Ontario.

traditional

cross
This job crosses the traditional boundary between social work and health care.

extend, push, push back
research which extends the boundaries of human knowledge

overstep
establish
define
blur
The Internet has blurred the boundary between news and entertainment.

across boundarys
His policies appeal across party political boundaries.

beyond the boundarys
This goes beyond the boundaries of what is accepted.

on the boundary
on the boundary of physics and chemistry

within the boundarys
the importance of keeping within the boundaries of the law

boundary between
the boundary between sanity and insanity

the boundaries of taste
In her performance she had clearly overstepped the boundaries of good taste.

sb/sth knows no boundaries
His passion for the arts knows no boundaries.