coach horns

Noun

coach horn (plural coach horns)

1. (historical) A long, straight, valveless instrument, traditionally made of copper, originally used as a signal horn on fast coaches.
   • An old guard, who writes upon the subject of coach-horns, calls attention to the fact of the difference existing between post and coach-horns by saying: "The coach-horn is now the only recognised horn used on a four-in-hand coach' but the post-horn, fifty or sixty years ago, was the recognised...1888, Athol Maudslay, Highways and Horses, pages 453–454