credits

Free Dictionary API

Gives us definitions, pronunciation, audio and example sentences.

A free, open-source dictionary API built and run by one developer, and used by millions of requests a month. It has no ads and no API keys, and runs on donations.

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Wiktionary

Gives us definitions and examples, directly and through the Free Dictionary API.

The free-content dictionary written by volunteers, a sister project of Wikipedia. Its text is shared under the Creative Commons Attribution-ShareAlike licence.

Kaikki.org

Gives us word origins (etymology) and pronunciations.

A machine-readable edition of Wiktionary built by Tatu Ylonen, which makes each word's history and pronunciation easy to reach. The text is Wiktionary's, under Creative Commons Attribution-ShareAlike.

WordNet

Gives us the topic categories every word is sorted into, and definitions when other dictionaries can't help.

A large lexical database of English built at Princeton University, grouping words by meaning. Its topic files are how we know a giraffe is an animal and a harbinger is a sign.

Princeton University. "About WordNet." WordNet. Princeton University. 2010.

Datamuse API

Gives us related words, spelling suggestions and word frequency.

A word-finding engine for developers. It finds words with a similar meaning, sound or spelling, and reports how common each word is in published English.

Wordnik

Gives us definitions and pronunciations while our main dictionary is unavailable, and candidate words for the daily pick.

A non-profit online dictionary with the mission of finding and sharing every word of English, including the ones traditional dictionaries leave out.

Wikipedia

Gives us the “On this day” events on the front page, and pages for characters, people, places and titles.

The free encyclopedia's editors pick notable events for every day of the year. Their text is shared under the Creative Commons Attribution-ShareAlike licence.