'sound barrier' definitions:
Definition of 'sound barrier'
(from WordNet)
noun
The increase in aerodynamic drag as an airplane approaches the speed of sound [syn: sonic barrier, sound barrier]
Synonyms of 'sound barrier'
From: Moby Thesaurus
- air speed,
- escape velocity,
- ground speed,
- knots,
- Mach,
- Mach number,
- Mach one,
- Mach two,
- shock wave,
- sonic barrier,
- sonic boom,
- sonic speed,
- sonics,
- speed of sound,
- subsonic speed,
- subsonics,
- supersonic speed,
- supersonics,
- ultrasonics