[{"word":"substructures","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The supporting part of a structure (either physical or organizational; the foundation).","synonyms":[],"antonyms":[]},{"definition":"The earth or gravel that the railway tracks are embedded in.","synonyms":[],"antonyms":[]}],"synonyms":["underbuilding"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/substructure","https://en.wiktionary.org/wiki/substructures"]}]