Emily Dickinson Lexicon

PI'BROCH, n. [Gael. piobaireachd, pipe-music; Celtic pib, piob, a pipe.]

A wild irregular species of music, peculiar to the Highlands of Scotland. It is performed on a bagpipe, and adapted to excite or assuage passion, and particularly to rouse a martial spirit among troops going to battle. – Encyc. Jamieson.