[{"word":"iff","phonetics":[],"meanings":[{"partOfSpeech":"conjunction","definitions":[{"definition":"If and only if; used to show that the truth values of two statements are the same.","synonyms":[],"antonyms":[]},{"definition":"Logically equivalent to rephrases:","synonyms":[],"antonyms":[],"example":"A rectangle is a square iff all four of its sides have the same length."},{"definition":"Obsolete spelling of if.","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/iff"]}]