1. martial music with variations; to be played by bagpipes;
The Collaborative International Dictionary of English v.0.48:
Pibroch \Pi"broch\, n. [Gael. piobaireachd pipe music, fr.
piobair a piper, fr. pioba pipe, bagpipe, from English. See
A Highland air, suited to the particular passion which the
musician would either excite or assuage; generally applied to
those airs that are played on the bagpipe before the
Highlanders when they go out to battle. --Jamieson.
WordNet (r) 3.0 (2006):
n 1: martial music with variations; to be played by bagpipes