Crosshatch is a traditional quilting pattern. Vertical and horizontal lines cross to form a grid on the quilt top. These lines may be spaced close together (heavy quilting) or further apart (moderately quilted).
On the left hand side of the photo below you can see the pattern made when the quilting lines “cross”. This crosshatching is a popular “filler” between quilted areas. Most of the crosshatch pattern below was done on a machine. The curved quilting design was done by hand.