'Derby Day' definitions:

Definition of 'Derby Day'

From: GCIDE
  • Derby \Der"by\ (?; usually ? in Eng.; 85), n.
  • 1. A race for three-old horses, run annually at Epsom (near London), for the Derby stakes. It was instituted by the 12th Earl of Derby, in 1780. [1913 Webster]
  • Derby Day, the day of the annual race for the Derby stakes, -- Wednesday of the week before Whitsuntide. [1913 Webster]
  • 2. A stiff felt hat with a dome-shaped crown. [1913 Webster]