- being, having, or capable of reaching a speed in excess of the speed of sound
WordReference Random House Learner's Dictionary of American English © 2026
su•per•son•ic /ˌsupɚˈsɑnɪk/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2026- Physicsgreater than the speed of sound waves through air.
- Physicscapable of achieving such speed:a supersonic plane.
- Physicsultrasonic.
su•per•son•ic
(so̅o̅′pər son′ik),USA pronunciation adj.
su′per•son′i•cal•ly, adv.
- Physicsgreater than the speed of sound waves through air.
- Physicscapable of achieving such speed:a supersonic plane.
- Physicsultrasonic.
- super- + sonic 1915–20
Collins Concise English Dictionary © HarperCollins Publishers::
supersonic /ˌsuːpəˈsɒnɪk/ adj
'supersonic' also found in these entries (note: many are not synonyms or translations):
scramjet
- sonic boom
- SST
- super-
- supersonics
- Tupolev
- aerodynamic wave drag
- aerothermodynamics
- air-superiority
- bow wave
- Concorde
- delta wing
- intercontinental ballistic missile
- intermediate range ballistic missile
- mirage
- thermal barrier
- tornado
- shock wave
- sidewinder
- SS
- superjet
- supersonic transport