Gone were the days for some people carrying out a thick dictionary in their bag or having to search on the numerous volume of encyclopedia in their book shelves (though I believe it’s a pretty good thing having a library or collection of books in your house or offices.)
Here are the lists of Free Online Dictionary / References and Encyclopedia I found in the internet, most of them maybe familiar to you, but as this blog tries to gather all related and similar online services, hope you find this lists interesting with just a click away from my blog.
Wikipedia - http://www.wikipedia.org A free, web-based, multilingual encyclopedia project supported by the non-profit Wikimedia Foundation. Its name is a portmanteau of the words wiki (a technology for creating collaborative websites, from the Hawaiian word wiki, meaning “quick”) and encyclopedia.
Wikipedia’s 14 million articles (3.1 million in English) have been written collaboratively by volunteers around the world, and almost all of its articles can be edited by anyone with access to the site (source: http://www.blippr.com/apps/337045-Wikipedia)
The Free Dictionary - http://www.thefreedictionary.com - The world's most comprehensive dictionary: English, Spanish, German, French, Italian, Chinese, Portuguese, Dutch, Norwegian, Greek, Arabic, Polish, Turkish, Russian, Medical, Legal, and Financial Dictionaries, Thesaurus, Acronyms and Abbreviations, Idioms, Encyclopedia, a Literature Reference Library, and a Search Engine all in one!
Dictionary.com - http://dictionary.reference.com - the largest and most trusted free online dictionary. Quickly find accurate definitions and audio pronunciations of words.
Thesaurus.com - http://thesaurus.com the largest and most trusted free online thesaurus brought to you by Dictionary.com. Quickly find synonyms and antonyms.
Reference.com - http://www.reference.com a free online encyclopedia and information reference. Research articles from Columbia Encyclopedia and Encyclopedia Britannica. This is also brought to you by Dictionary.com
Longman English Dictionary - http://www.ldoceonline.com is the leading dictionary for learners of English of all ages and levels who want to learn more about English: definition, idioms.
Wordnik.com - http://www.wordnik.com An online dictionary and language resource that provides dictionary and thesaurus content. It does not only gives you the meaning of the word but also provides examples sentences which gives you more understanding than a typical dictionary.