Supersonic
WordNet
adjective
(1) Having frequencies above those of audible sound
(2) (of speed) greater than the speed of sound in a given medium (especially air)
"A supersonic bomber flies so fast that it must release its bombs while the target is still over the horizon"
WiktionaryText
Adjective
- having a frequency too high to be audible
- greater than the speed of sound (in the same medium, and at the same temperature and pressure)