Dictionaries and Corpora

There are hundreds of dictionaries on the Internet.  Here is a selection of some of the best.  On this page you will also find links to corpora and concordance tools to analyse how words and phrases are used.

English Dictionaries 

Cambridge

Macmillan

Dictionary

Ninja Words

Phrases.net

Synonym.com

Phras.in
Phrase.up

Collocations 

Wording

Bilingual Dictionaries 

Wordreference

Spanishdict.com

Fun Dictionaries

A selection of fun and unusual dictionaries.  Good for building vocabulary and seeing words in context.

visuwords.com 

Lexipedia.com

One Look Reverse Dictionary

Wordnik.com

Tipofmytongue.com

Mnemonic Dictionary

Shahi Visual Dictionary

Easydefine.com

Corpora and Concordance Tools
Lextutor 
British National Corpus
WebCorp Live 

Spaceless (Text Concordancer - to analyse documents and web pages)
Wordle.net