a group of officers who patrol the borders of a country
a detachment used for security or reconnaissance
maintain the security of by carrying out a patrol
a line that indicates a boundary
extend on all sides of simultaneously; encircle
the activity of going around or through an area at regular intervals for security purposes
the boundary line or the area immediately inside the boundary
enclose in or as if in a frame
the boundary of a surface
form the boundary of; be contiguous to
