6(Book). Here's the most contemporary music dictionary on the market Conveniently divided into three main sections: The Dictionary of Music Terms defines over 2,000 music terms concisely, including notation and theory terms, instruments and terms used in pop music, electronic music and the music business; The Dictionary of Musicians provides more than 400 capsule biographies of composers and other musicians; and Reference Charts give instant, at-a-glance summaries of the essentials of music, encompassing instrumental and vocal ranges, notation signs and symbols, and scales, modes and key signatures.