Definition of sound barrier in English:

Share this entry

sound barrier

Pronunciation: /ˈsoun(d) ˌberēər/


(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.
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.

For editors and proofreaders

Syllabification: sound bar·ri·er

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.