[{"word":"keystone","phonetic":"/ˈkiː.stəʊn/","phonetics":[{"text":"/ˈkiː.stəʊn/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The top stone of an arch.","synonyms":[],"antonyms":[]},{"definition":"Something on which other things depend for support.","synonyms":[],"antonyms":[]},{"definition":"A native or resident of the American state of Pennsylvania.","synonyms":[],"antonyms":[]},{"definition":"(retail) A retail price that is double the cost price; a markup of 100%.","synonyms":[],"antonyms":[]},{"definition":"The combination of the shortstop and second baseman.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"verb","definitions":[{"definition":"To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.","synonyms":[],"antonyms":[]},{"definition":"(retail) To double the cost price in order to determine the retail price; to apply a markup of 100%.","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/keystone"]}]