[{"word":"keystones","phonetics":[],"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":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/keystone","https://en.wiktionary.org/wiki/keystones"]}]