Hypersonic

Origin

- + sonic

Full definition of hypersonic

Adjective

1. (of a speed, aviation) equal to, or greater than, or capable of achieving, five times the speed of sound.
2. (of a speed, aeronautics) far enough above the speed of sound so as to cause significant differences in behaviour due to chemical reactions or disassociation of the air.

Related terms

• plasmasonic
• supersonic
• transonic
• subsonic