This is a comprehensive dictionary API running off Wiktionary extract data, but enhanced with additional language support. It is 100% free to use. Ingests are run biweekly if time permits. The repository is not currently open source, but will be in the future. If you have any questions or wish to contribute, you can message me on our Discord server (@pemmes). Disclaimers below.
This API drives the dictionary feature in Relyc. If you are interested in the Relyc project, you can find more information here.
Request:
GET /api/v1/dictionary/lookup?word=test
Response:
{
"word": "test",
"entries": [
{
"lang": "en",
"lemma": "test",
"pos": "noun",
"ipa": "/tΙst/",
"definitions": [
{
"locale": "en",
"definitions": [
"A challenge, trial.",
"An examination, given often during the academic term."
]
}
],
"forms": []
},
{
"lang": "es",
"lemma": "test",
"pos": "noun",
"ipa": "/test/",
"definitions": [
{
"locale": "en",
"definitions": [
"Test, examination."
]
}
],
"forms": []
}
],
"source": {
"name": "Wiktionary",
"url": "https://www.wiktionary.org",
"license": "CC BY-SA 4.0"
}
}
π Interactive API Documentation (Swagger UI)
π Alternative API Documentation (ReDoc)
Version 1.0.0
Status: success
Date: 2025-09-16 10:12:30 UTC
Lemmas Processed: 2,999,738
Senses Processed: 23,493,312
Duration: 34835.65 seconds
Data Source Disclaimer: This API incorporates data derived from Wiktionary, which is available under the Creative Commons Attribution-ShareAlike 4.0 Unported License (CC BY-SA 4.0). Content is contributed by Wiktionary editors and may be freely reused under the same license. This service is not affiliated with or endorsed by Wiktionary or the Wikimedia Foundation.