A bugle fitted with keys to increase the number of its sounds.
(Invented by James Halliday about 1815, and by him named the Kent Bugle.)
1836–9. Dickens, Sk. Boz (1850), 249/1. The loud notes of key-bugle broke the monotonous stillness of the street.
1884. J. Colborne, Hicks Pasha, viii. 86. Each battalion marched out to the inharmonious braying of their key-bugles.
