Free online version at Yahoo! Education, with over 200,000 entries featuring 10,000 new words and senses, 70,000 audio word pronunciations, 900 full-page color illustrations, language notes and word-root appendixes.
Previous (1989) edition of the most complete and authoritative dictionary of the English language. Cites quotations demonstrating the use of each word defined to illustrate development of its usage and meaning. (Superceded by the new, web-based, third edition of the OED, in which entries from this second edition are gradually being updated.)
Acronyms, Initialisms, and Abbreviations Dictionary (GVRL)
Gale Virtual Reference Library
Provides definitions of a wide variety of acronyms, initialisms, abbreviations and similar contractions, translating them into their full names or meanings. Terms from subject areas such as associations, education, the Internet, medicine and others are included. 4 v.