Acronym Finder

Find out what any acronym, abbreviation or initialism stands for.

Dictionary.com

Provides audio pronunciation, related searches and synonyms.

Encarta Dictionary

Includes thesaurus for finding synonyms and antonyms.

Merriam-Webster Online

Includes links to a visual dictionary and a learner's dicitonary for ESL, EFL, and TOEFL students.

Oxford English Dictionary

Authoritative definitions along with etymological analysis and history of usage.