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⇱ sound barrier - WordReference.com Dictionary of English


WordReference Random House Learner's Dictionary of American English © 2026
ˈsound ˌbar•ri•er, n. [uncountable] Idioms
    1. Physics, Idioms break the sound barrier, to travel faster than the speed of sound.


WordReference Random House Unabridged Dictionary of American English © 2026
sound′ bar′rier, 
    1. Physics, AeronauticsAlso called sonic barrier, transonic barrier. (not in technical use) a hypothetical barrier to flight beyond the speed of sound, so postulated because aircraft undergo an abruptly increasing drag force induced by compression of the surrounding air when traveling near the speed of sound.
    2. Physics break the sound barrier, to travel faster than the speed of sound.
    • 1950–55

Collins Concise English Dictionary © HarperCollins Publishers::
sound barrier n
  1. (not in technical usage) a hypothetical barrier to flight at or above the speed of sound, when a sudden large increase in drag occursAlso called: sonic barrier
'sound barrier' also found in these entries (note: many are not synonyms or translations):

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