a slight arching or upward sloping from the sides to the middle of a road, deck, beam, etc

the degree to which an aircraft wing or other aerofoil curves up from its front edge and down again to its back edge

a positioning of the wheels of a motor vehicle so that they are closer together at the bottom than at the top

to curve upwards in the middle

to cause (e.g. a road or deck) to curve in this way