[{"word":"spacetime","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The four-dimensional continuum of the three spatial dimensions plus time.","synonyms":[],"antonyms":[]},{"definition":"An n-dimensional continuum consisting of dimensions of both space and time. Normally spacetime is considered as having 4 dimensions (x, y, z, t), but higher-dimensional spacetimes are often encountered in theoretical physics, e.g. the 5-dimensional spacetime of Kaluza-Klein theory or the 11 dimensions of spacetime in M-theory.","synonyms":[],"antonyms":[]},{"definition":"A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with \"metric\" within the context of general relativity.","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/spacetime"]}]