[{"word":"ultrafast","phonetics":[],"meanings":[{"partOfSpeech":"adjective","definitions":[{"definition":"Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/ultrafast"]}]