Dictionary Word lookup

We provide a Ultrafast Dictionary Word lookup API

Retrieve Dictionary words using REST API with field filtering flexibility in JSON, XML, TAB, CSV, or TXT format.
The API is designed for consumption with minimal client code.

Our common words pages summarise the definitions and Part of Speech (POS) categories for the most common words in English.
Words can be sorted by frequency or alphabetically.

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Dictionary word data used by our API Service

We are using the WordNet dictionary provided by Princeton University and a Lemmatization dictionary file from the Stanford NLP Group.
Their dictionaries are free to use, and we are not in any partnership with them.

Princeton University

The Stanford NLP Group

Google Books Ngrams data set

If you find inaccuracies in the data used by our API Service, please send us a note.