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Merriam-Webster API keys for definitions + American audio (Collegiate Dictionary) and synonyms/antonyms (Collegiate Thesaurus). Free keys from dictionaryapi.com.
Oxford Dictionaries API for British English definitions. Free tier (3,000 calls/month) from developer.oxforddictionaries.com.
Wordnik API for extra definitions. Free key from developer.wordnik.com.
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Upload your own dictionaries. Supported formats: TSV/TXT (word⇥definition per line), CSV (word,definition), JSON, MDX.
Format guide & examples
::):abandon v. to give up completelyCSV —
word,definition per line (quotes supported).JSON — array of objects or pairs:
[{"word":"abandon","definition":"v. to give up"}, ...]or
[["abandon","v. to give up"], ...]MDX — MDict dictionary files (zlib and LZO compressed both supported). HTML in definitions is stripped automatically. Encrypted MDX is not supported — convert it to TSV/CSV/JSON first.
MDD — not needed: MDD files only hold images/audio/CSS for an MDX; definitions live in the .mdx file, so upload that instead.
Limits: 20 MB per file, 200,000 entries max. Definitions are truncated to 2000 chars.
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