Wordnik

Dictionaries

Visit website

Dictionary Data.

About Wordnik

Wordnik is a developer API providing access to English-language word data, including definitions aggregated from five dictionaries (American Heritage Dictionary of the English Language, Century Dictionary, Wiktionary, GNU International Dictionary of English, and WordNet) covering more than 800,000 words.

The API also returns synonyms, antonyms, and other word relations, real example sentences with source links for more than 10,000,000 words, and audio pronunciations. It additionally offers a word-of-the-day endpoint and a random-word endpoint.

Access requires a Wordnik account and an API key obtained after logging in. Wordnik operates as a non-profit with a stated mission to document and share the English language.

Key features

Definitions aggregated from five dictionaries covering more than 800,000 words
Synonyms, antonyms, and other related word relations
Real example sentences with links to their sources for over 10,000,000 words
Audio pronunciations
Word-of-the-day API
Random-word API

Frequently asked questions

What dictionaries does the Wordnik API pull definitions from?

It aggregates definitions from five dictionaries: the American Heritage Dictionary of the English Language, the Century Dictionary, Wiktionary, the GNU International Dictionary of English, and Wordnet.

How do I get access to the API?

You need to log in to a Wordnik account to request an API key, or sign up for an account if you don't have one.

What kind of word data can I retrieve besides definitions?

You can retrieve synonyms, antonyms, other word relations, audio pronunciations, example sentences, a word of the day, and random words.

Who is the Wordnik API for?

It's for developers building applications that need dictionary and word-reference data, and using it supports Wordnik's non-profit mission to document every word of English.