Online dictionaries

English dictionaries and thesauri freely available online


  • Collins Search dictionary or thesaurus. Also offers a foreign translation service for words or text. 
  • Chambers Search dictionary or thesaurus. or biographical dictionary.
  • Macmillan Search dictionary or thesaurus. Includes specific content designed for learners of English, including audio pronounciation. 
  • Onelook Indexes 1062 different dictionaries (subject dictionaries, as well as major English language ones).