This volume serves as a comprehensive reference tool designed to provide accurate definitions and historical context for musical terminology and figures. Michael V. Kennedy, building upon the foundational work of Percy Scholes, synthesizes decades of musicological research to update and expand the dictionary's scope. The text functions as a practical guide for students, performers, and listeners seeking clarity on technical notation, composer biographies, and the evolution of musical styles through the twentieth century.

Experts and educators frequently cite this dictionary as a reliable, portable resource for quick verification of musical facts. Readers often note the balance between technical precision and accessibility, making it a standard reference for those navigating the breadth of Western music history.