The act, art, or practice, of riding a cycle, esp. a bicycle or tricycle.

the sport of traveling on a bicycle or motorcycle

a member organization of the United States Olympic Committee and the Union Cycliste Internationale

Sport or athletic sock designed specifically for cycling enthusiasts. Generally has a heavy knitted pad in the arch of the foot where the pedal makes contact with the foot.

bicycling

Cycling is a recreation, a sport and a means of transport across land. It involves riding bicycles, unicycles, tricycles, quadricycles and other human powered vehicles (HPVs). As a sport it is governed internationally by the Union Cycliste Internationale in Switzerland (for upright bicycles) and by the International Human Powered Vehicle Association (for other HPVs).