The Free Dictionary
communityComprehensive online reference with 14+ million entries across dictionaries, thesauruses, encyclopedias, and medical/legal references. One of the most visited reference sites with 2+ billion annual page views.
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GET
/api/v1/dictionaryLook up a word definition
Parameters
dictgeneral|medical|legal|financial|idioms (stringoptionalwordword to look up (stringrequiredReturns
entry{word, pronunciations[], definitions[{pos, definition, examples[]}], synonyms[], antonyms[], etymology}GET
/api/v1/encyclopedia/searchSearch encyclopedia entries
Parameters
qtopic (stringrequiredReturns
results[] with title, summary, urlGET
/api/v1/thesaurusGet synonyms and antonyms for a word
Parameters
wordstringrequiredReturns
entry{word, synonyms[], antonyms[], related_words[]}