[{"word":"preorder","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"An order for goods or services placed in advance.","synonyms":[],"antonyms":[]},{"definition":"A binary relation that is reflexive and transitive.","synonyms":[],"antonyms":[],"example":"The relation of logical implication over sentences is an example of a preorder."}],"synonyms":["quasiorder"],"antonyms":[]},{"partOfSpeech":"verb","definitions":[{"definition":"To order (goods or services) in advance, before they are available.","synonyms":[],"antonyms":[]},{"definition":"To sort or arrange beforehand.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"adjective","definitions":[{"definition":"(of a traversal of a tree) Such that, recursively, the root is visited before the left and right subtrees.","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/preorder"]}]