Merriam-Webster's Online Dictionary

Merriam-Webster's Online Dictionary is based on the extensive citation files of Merriam Webster and has nearly 160,000 entries. The researcher and student will find useful its more than 4,400 notes explaining the contemporary nuances of words in common use. Foreign phrases such as "dolce vita," "de mortuis nil nisi bonum," and "ars longa, vita brevis" and abbreviations such as GIGO, GNP, and GM can be searched easily.