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Status of Availability

The Dictionary API beta program has been suspended and the API is in a deprecated status. The API is still currently accessible to existing applications although public availability will be ending before the end of 2017. A notification will be sent to active developers once an exact shutdown schedule has been determined.


The Dictionaries API is a beta set of APIs introduced to provide a simplified and consistent access to content from multiple different dictionaries, while enhancing the ability to find and use data from within the dictionaries.

Along with new features, the Dictionaries API includes best-selling titles aimed at non-native speakers of the English Language, such as the Longman Dictionary of Contemporary English, Longman Active Study Dictionary and the Longman English-Chinese Dictionary of 100,000 Words (New 2nd Edition).

Key Features

Key new features include:

  • Updated search capabilities: More flexible and accurate way to search in order to find content more quickly.
  • Updated content: In addition to the existing dictionary, we've added the Longman WordWise Dictionary, with additional Dictionaries to follow shortly.

Maintained, existing features include:

  • Hundreds of thousands of words, phrases and meanings, including general, technical and business vocabulary
  • 100,000 words, phrases, and meanings in English translated into traditional Chinese characters
  • Over 165,000 corpus-based example sentences
  • Over 150,000 collocations which show words that are frequently used together
  • Over 20,000 synonyms, antonyms, and related words to provide rich lexical network
  • Audio files in British and American English for all entry words and 88,000 example sentences
  • Highlighting of the Academic Word List for learners who are studying in an English-speaking environment
  • Phrases with examples to explain how typical idiomatic expressions are used
  • Grammar and usage notes to help students avoid common errors

More information about the updates to this API can be found in our Blog.



Dictionary Parameter

Use the {dictionary} parameter to determine the dictionary from which you want to return entries. The options are:

Valid Value Dictionary

Longman Dictionary of Contemporary English (5th edition)


Longman Active Study Dictionary


Longman English-Chinese Dictionary of 100,000 Words (New 2nd Edition)


Longman Wordwise Dictionary


Longman Afrikaans to English

leasd Longman English to Afrikaans

Longman Advanced American Dictionary

laes English to Latin American Spanish

Latin American Spanish to English


English to Brazilian Portuguese


Brazilian Portuguese to English

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