adjective.
Of, relating to, or capable of speed equal to or exceeding five times the speed of sound.
the GNU version of the Collaborative International Dictionary of English
noun.
Pertaining to or moving at a speed greatly in excess of the speed of sound, usually meaning greater than mach 5. All speeds in excess of the speed of sound are supersonic, but to be hypersonic requires even higher speed.
adjective.equal to, or greater than, or capable of achieving, five times the speed of sound.
adjective.
far enough above the speed of sound so as to cause significant differences in behaviour due to chemical reactions or disassociation of the air.
Word Usage
"The tool kit is standard NOW, however the repairs have never been testing in hypersonic flight, then may cause more drag and local to the repair."