Collins
Access bilingual dictionary and thesaurus data through API key authentication.
Read docs Updated 2026-06-17
What is Collins?
The Collins API provides bilingual dictionary definitions alongside thesaurus synonyms and related terms in a machine-readable format.
It supports integration into language processing pipelines, translation platforms, educational tools, and any application needing accurate multilingual lexical datasets.
What you can build with Collins
Language learning app integration
Pull structured bilingual dictionary entries to display definitions, examples, and translations for vocabulary flashcards or interactive lessons.
Writing assistant enhancement
Query thesaurus data to suggest synonyms and related terms in real time within text editors or content creation tools.
Translation reference tool
Embed lexical lookups for multiple language pairs to support translators needing quick, structured word references during localization projects.
Get started with Collins
- 1Sign up for a Collins API key
- 2Review the endpoint documentation for dictionary and thesaurus methods
- 3Include the API key in request headers for authentication
- 4Make HTTPS calls to retrieve bilingual entries or thesaurus data
- 5Parse the structured JSON responses in your application
Collins: pros & cons
Pros
- +Provides structured bilingual dictionary and thesaurus data
- +Supports multiple language pairs for lexical reference
- +Secure HTTPS access with API key authentication
- +Ready-to-use lexical content without needing to build datasets
Cons
- –Requires an API key for all access
- –Limited to dictionary and thesaurus lookups rather than full NLP pipelines
- –Language coverage depends on available pairs and may not be exhaustive
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Frequently asked questions
It supplies structured bilingual dictionary entries and thesaurus data for multiple language pairs via HTTPS.
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