Oxford English Dictionary
Skeptic's Dictionary
Dictionary of Scientific Biography
Dictionary of National Biography
Online Etymology Dictionary
The New Grove Dictionary of Opera
The Gardeners Dictionary
Easton's Bible Dictionary
Dictionary of Greek and Roman Biography and Mythology
A Dictionary of Greek and Roman Antiquities
Free On-line Dictionary of Computing
Oxford Dictionary of Byzantium
Black's Law Dictionary
Mosby's Dictionary of Medicine, Nursing & Health Professions
A Dictionary of the English Language
Black's Medical Dictionary
Grove Dictionary of Music and Musicians
Biographical Dictionary of the Extreme Right Since 1890
El Diccionari del Diable
The Dictionary of Obscure Sorrows
Dictionary of Greek and Roman Geography
Diccionari de la Llengua Irlandesa
Dictionary of Medieval Names from European Sources
Cyclopaedia
Interlingua