(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it | the alignment of the wheels of a motor vehicle closer together at the bottom than at the top |
a passageway under a curved masonry construction | a slope in the turn of a road or track; the outside is higher than the inside in order to reduce the effects of centrifugal force |
a curved bony structure supporting or enclosing organs (especially the inner sides of the feet) | a slight convexity (as of the surface of a road) |
a curved shape in the vertical plane that spans an opening | |