- sound barrier as a noun:
- 1
sound barrier
noun
1 sound barrier
The increase in aerodynamic drag as an airplane approaches the speed of sound.
synonym: sonic barrier.
Moby thesaurus: Mach, Mach number, Mach one, Mach two, air speed, escape velocity, ground speed, knots, shock wave, sonic barrier, sonic boom, sonic speed, sonics, speed of sound, subsonic speed, subsonics, supersonic speed, supersonics, ultrasonics.
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