• Oxford Dictionary
• Oxford Learner’s Dictionary
• Free online Dictionaries
• Cambridge Free English Dictionary and Thesaurus
• Collins Dictionaries
• Merriam-Webster Online: Dictionary and Thesaurus
• Macmillan Dictionary and Thesaurus
• Dictionary.com
• Acronym Finder
• Urban Dictionary
• Definations.net
• Visual Thesaurus
• Vocabulary.com
• Medical dictionary
• Crossword Dictionary
• Legal dictionary
• Online Etymology Dictionary
• Reference.com
• FOLDOC – Computing Dictionary
• The free dictionary

Encyclopedias

• Marathi Vishwakosh
• Wikipedia
• Encyclopedia Britannica
• Free online Encyclopedia
• Infoplease
• Answers.com
• Encyclopedia.com
• Encyclopedia Mythica
• Encyclopedia of Life
• Encyclopedia of Philosophy
• Freebase
• Stanford Encyclopedia of Philosophy
• Bartleby
• Dkonline.encyclopedia
• Scholarpedia
• Who2
• World digital library
• How Stuff Works