The door had been raised and the garage yawned an empty rectangle of darkness.

Notice, for instance, on the back wall above his head that empty rectangle marking the place where a picture has been taken down.

Even as his mind focused upon these geometrical simplicities, the empty rectangle filled with stars.

The problem of empty isothetic rectangles among isothetic line segments was first considered in 1990.

Later a more general problem of empty isothetic rectangles among non-isothetic obstacles was considered.

The factory was roofless and the windows were empty rectangles in the broken walls.

She looked at the dark, empty rectangle of the door.

Waylock stared in shock at the empty rectangle of light.

Looking through the empty rectangle of a window I could see rows of what could only be beds or bunks.

Yet you could say it all with a horizon line drawn across an empty rectangle.