FarsiDic : Free English-Persian and Persian-English.
Acronym finder :
The Acronym Finder is a World Wide Web searchable database of more that 228,000 abbreviations and acronyms about computers, technology, telecommunications, and military acronyms and abbreviations.
Dictionary of Initials Acronyms and Abbreviations :
Alphabetical list of initial and acronyms.
Merriam Webster online :
searching online versions of collegiate dictionary and thesaurus.
OneLook Dictionaries :
searching the 4285381 words in 746 online dictionaries. search spell online-dictionary web sites with the word.
American Heritage Dictionary of the English Language :
Over 90,000 entries feature 10,000 new words and senses, 70,000 audio word pronunciations, 900 full-page color illustrations, language notes and word-root appendixes
Dictionary.com :
Searching in dictionary and Thesaurus and using translation service .
Babylon :
Babylon's single click translation, information access and conversion users with immediate answers to vital questions, from multiple sourt dictionaries in 13 languages.
Cambridge Dictionaries Online :
Search online version of cambridge dictionaries and access to related hypertext links.
Oxford Advanced Learner's :
Searching online version of oxford advanced Learner's Dictionary terms.
Biographical Dictionary :
This dictionary covers more than 28,000 notable men and women who have shaped our world from ancient times to the present day. The dictionary can be searched by birth years, death years, positions held, professions, literary and artistic works, achievements, and other keywords.
Slang :