Definition of corner:
(n) :
the
point where two converging lines meet; an
angle, either external or internal; the space in the angle between converging lines or walls which meet in a point
"the corners of the wire mesh were reinforced with little blobs of solder."
(v) :
to
drive (someone) into a corner or other
confined space; to
trap in a position of great difficulty or hopeless embarrassment
"the cat had cornered a cricket between the sofa and the television stand."