airlock
🇺🇸
/ˈerlɑːk/
🇬🇧
/ˈeəlɒk/
A small room with doors at both ends that you pass through to enter or exit an area with different air pressure, like on a spacecraft or submarine.
The astronauts had to go through the airlock to get from the spacecraft to the space station.
A pocket of air that stops the flow of liquid in a pump or pipe.
The plumber had to fix the airlock in the pipe to get the water flowing again.