supersonic means greater than the speed of sound (in the same medium, and at the same temperature and pressure). Lexicurio rates it Rare gem — a strength score of 74 out of 100.
adj
- Greater than the speed of sound (in the same medium, and at the same temperature and pressure).“supersonic jet”
- Ultrasonic, having a frequency too high to be audible.
noun
- An aircraft that can travel at the speed of sound.