The river forms the boundary.
The boundary was fixed just south of the farm.
a boundary dispute between Brazil and Paraguay
They drove across the boundary.
We continued along the southern boundary of the county.
We had to stop at the boundary.
on the boundary of the two countries
She had never strayed beyond the city boundaries.
within the boundaries of the old city walls
the boundary between Sussex and Surrey
The state has a boundary with Ontario.
This job crosses the traditional boundary between social work and health care.
research which extends the boundaries of human knowledge
The Internet has blurred the boundary between news and entertainment.
His policies appeal across party political boundaries.
This goes beyond the boundaries of what is accepted.
on the boundary of physics and chemistry
the importance of keeping within the boundaries of the law
the boundary between sanity and insanity
In her performance she had clearly overstepped the boundaries of good taste.
His passion for the arts knows no boundaries.