Definition of sound barrier in English:

sound barrier

Syllabification: sound bar·ri·er

noun

(the sound barrier)
  • The increased drag, reduced controllability, and other effects that occur when an aircraft approaches the speed of sound, formerly regarded as an obstacle to supersonic flight.
    More example sentences
    • On its third flight, the aircraft broke the sound barrier, reaching a speed of Mach 1.1.
    • The shock waves set up when you go through the sound barrier also add to drag.
    • As a result, an aircraft creates a sudden discontinuity in pressure and temperature called a shock wave as it breaks the sound barrier.

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