Dolmetsch Online

Good Musical dictionary, theory tutorials, history reference and information about the physics of music

Virginia Tech Multimedia Dictionary

Multimedia musical dictionary, each definition is supported by audio files.

Naxos Glossary of Classical Music

Glossary and links to other information about Classical Music to support their recorded catalogue

Glossary of Musical Terms

Simple Glossary

Cadenza.org Glossary

English, French, German, Italian or Serbian Musical Glossary

Online Music Dictionary

Free dictionary of musical terms