Oxford Concise Dictionary of Music - 5th Edition 

by Michael Kennedy and Joyce Kennedy

Description: 

The most authoritative and up-to-date dictionary of music available in paperback.
Coverage includes musical terms from allegro to zingaro, and musical works from 
Aida to Zauberflöte, as well as composers, libretists, musicians, singers and orchestras.
Wide-ranging and clearly written, it provides a rich mine of information for all lovers of music.