When used as a warhorn it can mean either "here comes fun!" or "I'm coming to kill you" (or both) depending on the context. Otherwise defined as an ear-splitting good time.
The bugles commonly called "cavalry bugles", because that's what they come with, have no keys and can only play 4ths and 8ths. Forinstance, A B flat bugle can only play B flats and Fs, though of many octaves.
Modern bugles are keyed and also called Kent Bugles.
A bugle-horn used as a heraldic charge is always depicted as a medieval-style warhorn hanging from a short ribbon. If the ribbon is a different colour from the horn itself, the tincture must be noted in the blazon.
Bugle or bugleweed is a member of the mint family.