English Language Dictionaries
-
Searchable dictionaries from Cambridge University Press: Cambridge International Dictionary of English; Cambridge Learners Dictionary; Cambridge Dictionary of American English; Cambridge International Dictionary of Idioms; Cambridge International Dictionary of Phrasal Verbs.
- OneLook Reverse Dictionary
-
Users may type in a concept into a search engine and receive a list of words and phrases related to that concept. There are several other uses to the site, including the ability to explore related concepts, answer basic identification questions and solve crossword clues.
- Webster's Revised Unabridged Dictionary
-
Searchable 1913 edition.
- Merriam Webster Online: The Language Center
-
Search the Merriam Webster Dictionary or Thesaurus.
- The Word Spy
-
Searchable dictionary of newly-coined words, existing words back in use and older words now used in new ways, updated each weekday, maintained by Paul McFedries.
- Oxford English Dictionary

-
Online version of the 2nd edition of the 23 volume print set. Updates will include 1000+ new words. In addition, the search features scale from simple to the complex, and users can search by keyword, author, quotation, and more.
- WordNet: A Lexical Database for the English Langauge
-
Developed at Princeton University's Cognitive Science Laboratory.