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in music, traditionally, any adaptation of a composition to fit a medium other than that for which it was originally written, while at the same time retaining the general character of the original. The word was frequently used interchangeably with transcription, although the latter carried the connotation of elaboration of the original, as in the virtuosic piano transcriptions of J.S. Bach's organ works by Franz Liszt, the Italian composer-pianist Ferruccio Busoni, and others. In later times the definitions were almost reversed, with arrangement connoting musical liberty in elaboration or simplification. In popular music and jazz, the word is often used synonymously with "score."