Much harder to justify the scurf of knick-knacks that infests every horizontal surface of the stylish modern dwelling.

Used close up in the workshop its beam was nothing special, and the torch rolled around irritatingly when placed on anything less than a perfectly horizontal surface.

Adding a vertical fillet to a horizontal surface will create a light vertical shadow.

The tail had two vertical rudders with a single horizontal surface between.

When bulk granular materials are poured onto a horizontal surface, a conical pile will form.