Definition of Derby
noun (plural Derbies)
1an annual horse race for three-year-olds, founded in 1780 by the 12th Earl of Derby. The race is run on Epsom Downs in England in late May or early June. a race similar to the Derby elsewhere:the Kentucky Derby (derby) a sporting contest open to the general public:sign up for the fishing derby 2 (derby, also derby hat) a bowler hat.
[said to be from American demand for a hat of the type worn at the Epsom Derby]
3a boot or shoe having the eyelet tabs stitched on top of the vamp.
[so named because originally a sports boot]