[{"word":"subsonic","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"An aircraft whose maximum speed is less than the speed of sound","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"adjective","definitions":[{"definition":"(of a sound, scientific) having a frequency too low to be audible","synonyms":[],"antonyms":[]},{"definition":"(of a sound, literary) very quiet, almost inaudible","synonyms":[],"antonyms":[],"example":"The noise of the ship was all around her. The faint subsonic rumble of the reactor and drive. (Leviathan Wakes, James S. A. Corey)"},{"definition":"(of a speed) less than the speed of sound (in the same medium, and at the same temperature and pressure)","synonyms":[],"antonyms":[]},{"definition":"(of a flow) with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources)","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/subsonic"]}]