| sound barrier | |
| —n | |
| (not in technical usage) sonic barrier, Also called: transonic barrier a hypothetical barrier to flight at or above the speed of sound, when a sudden large increase in drag occurs | |
| a chattering or flighty, light-headed person. |
| a stew of meat, vegetables, potatoes, etc. |
| sound barrier
The sharp increase in drag experienced by aircraft approaching the speed of sound. Also called sonic barrier. |
The sudden increase in air resistance that occurs when an aircraft approaches the speed of sound. This is also called the sonic barrier.