/pee"brddokh/ , n.
(in the Scottish Highlands) a piece of music for the bagpipe, consisting of a series of variations on a basic theme, usually martial in character, but sometimes used as a dirge.
[ 1710-20; piobaireachd piper music, equiv. to piobair piper ( piob PIPE 1 + -air agent suffix -arius -ARY) + -eachd n. suffix denoting quality or state ]