Definition of heat barrier in English:

heat barrier

noun

  • The limitation of the speed of an aircraft or other flying object by heat resulting from air friction.

    • ‘However, he further maintains that we have also reached a moment when humans, who have already surpassed the sound and heat barriers, are left with nothing to race against but speed of light - something which can never be surpassed.’
    • ‘The result is a virtually invisible sound and heat barrier.’

Pronunciation

heat barrier

/hēt ˈberēər/