Dictionaries & Thesauri

Definitions, Etymologies, Synonyms & Antonyms, and More

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Abbreviations and Acronyms
Abbreviations.com
Abbreviations in Dictionaries
List from Dictionary.com.
Acronymfinder
You can enter the exact acronym, "begins with" or a key word from the acronym.
ChatRef.com
Chat acronyms, texting abbreviations, and emoticons (smileys). Search or browse.
Netlingo
A list of acronymns and text messaging shorthand.
Official USPS Abbreviations
Post office abbreviations. Includes states, street suffixes, and "secondary unit designators." From United States Postal Service.
Stock Market: Company Stock Symbols
Look up companies and their stock symbols.


Dictionaries - Words, Their Meanings, Usage, Etymology
Cambridge Dictionaries Online
Search several different dictionaries including the Advanced Learner's Dictionary, American English, and the International Dictionary of Idioms.
Compact Oxford English Dictionary
145,000 words, definitions, and phrases. You can search both for individual words and words within other definitions (full text search). From Oxford Dictionaries.
Dictionary.com
Includes audio pronunciations of words and a thesaurus.
Glossarist
"A searchable directory of glossaries and topical dictionaries." Search or browse by topic.
Learner's Dictionary: American English Dictionary for ESL, EFL, and TOEFL Students
From Merriam-Webster. Includes audio pronunciations of words.
Merriam-Webster Online
Dictionary and Thesaurus. Includes audio pronunciations of words.
OneLook Dictionaries
Query more than 500 general and specialized dictionaries at once. Links to all of them organized by topic.
Online Etymology Dictionary
Word origins (etymologies). Search or browse words, word parts. Meanings are drawn from multiple etymological dictionaries.
Reverse Dictionary
"The reverse dictionary lets you go from a concept/idea/definition to words and phrases used to describe that concept."
Wordnik
"Our goal is to show you as much information as possible, as fast as we can find it, for every word in English, and to give you a place where you can make your own opinions about words known."
Visuwords
An online graphical dictionary. Enter a word and it will give you synonyms, verbs, parts of speech, adverbs, adjectives and more.
Visual Dictionary
Browse by category or type in an object. An image is displayed with all its parts labeled using English or French terms.
Your Dictionary
More than just a site of standard English dictionaries and thesauruses, this site also includes over 200 foreign language dictionaries and translator programs as well as specialized dictionaries for professional vocabularies like medicine, business, and computer science.


Phrases, Sayings, Idioms Web Resources
Cambridge International Dictionary of Idioms
Search phrases by one or more keywords.
Brewer's Dictionary of Phrase and Fable
"Giving the derivation, source, or origin of common phrases, allusions, and words that have a tale to tell."
English Idioms and Idiomatic Expressions
Search or browse entries.
The Phrase Finder
"The meanings and origins of over 1,200 English sayings, phrases and idioms."
Quotations
Popular and historic quotes.


Rhyming Dictionaries - Find Rhymes for Words
Online Rhyming Dictionary for Poetry and Songwriting
After entering the word to rhyme you can choose end rhymes, last syllable rhymes, double rhymes, beginning rhymes, and first syllable rhymes.
RhymeZone
Type in a word to find its rhymes, synonyms, definitions and more.


Thesaurus / Thesauri - Find Synonyms & Antonyms
Merriam-Webster Online: Thesaurus
Roget's II: The New Thesaurus
Read carefully to avoid advertisements. The search box is currently at the very top of the page, and all advertisements are marked as such.
Roget's International Thesaurus of English Words and Phrases
Includes Roget's II: The New Thesaurus and Roget's International Thesaurus of English Words and Phrases. Provided by Bartleby.com.
Synonym.com
Type in a word to find its synonym, antonym or definition.
WordNet
This database from Princeton University can be used simply as a thesaurus or to do lexical research. Click on "Use Word Net Online" to do a search.
Your Dictionary
More than just a site of standard English dictionaries and thesauruses, this site also includes over 200 foreign language dictionaries and translator programs as well as specialized dictionaries for professional vocabularies like medicine, business, and computer science.

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