Collins
Bilingual Dictionary and Thesaurus Data.
About Collins
The Collins Dictionary REST API provides programmatic access to dictionary and thesaurus data across multiple Collins dictionaries, identified by a dictCode parameter. Endpoints cover listing available dictionaries, retrieving word-of-the-day entries (including a preview variant), searching for terms with pagination, first-match search, and spelling suggestions ("did you mean"). Responses are available in both JSON and XML formats.
Beyond search, the API exposes individual dictionary entries by entryId, along with related data such as nearby entries, pronunciations (with a language parameter), and related entries. It also provides thesaurus topic browsing by topic ID within a named thesaurus. This is a reference API suited for developers building applications that need dictionary lookups, word definitions, pronunciations, or thesaurus data.
Key features
- Search dictionary entries across multiple languages via dictCode
- Retrieve word-of-the-day entries and previews
- Full entry lookups with nearby, related, and pronunciation data
- Spelling suggestion ("did you mean") lookups for search queries
- Thesaurus topic browsing by topic ID
- Responses available in both JSON and XML formats
Frequently asked questions
What data formats does the API return?
Responses are available as either application/json or application/xml for every endpoint.
What kind of content can I retrieve from this API?
The API exposes dictionary entries, word-of-the-day data, search and spelling-suggestion results, thesaurus topics, and entry pronunciations/related entries.
How do I query a specific dictionary?
Most endpoints take a dictCode template parameter to specify which dictionary to query.
Is there a search feature?
Yes, the API provides search, search/first, and search/didyoumean endpoints with query parameters like q, pagesize, and pageindex.
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