1. The increase in aerodynamic drag as an aeroplane approaches the speed of sound
   - sonic barrier

Derived forms: sound barriers

Type of: drag, retarding force

Encyclopedia: Sound barrier

• self-loader
• self-loading
• self-locking
• self-love
• self-loving
• self-luminous
• self-made
• self-mortification
• self-moving
• self-opinionated
• self-organisation
• self-organization
• self-perpetuating
• self-pity
• self-pitying
• self-pollinated
• self-pollinating
• self-pollination
• self-portrait
• self-possessed
• self-possession
• self-praise
• self-preservation
• self-pride
• self-proclaimed