forage cap

forage cap (plural forage caps)

1. Any of various originally military caps intended for undress or working use.
   • 1903, Arthur Conan Doyle, The Adventures of Gerard‎, Chapter 4:

     As to my dress, I covered my Hussar uniform with a long cloak, and I put a grey forage cap upon my head.

   • 1994, Claire Tomalin, Mrs Jordan's Profession, Penguin, published 2012, page 45:

     [C]arpenters and scene painters, in their blouses and forage caps, moved about taking instructions, actors stood gossiping and going through their cues.