air lock
ˈair lock
noun [countable]
1. a small room used for moving between two places that do not have the same air pressure, for example in a spacecraft
2. a small amount of air in a pipe that stops liquid flowing through it
ˈair lock
noun [countable]1. a small room used for moving between two places that do not have the same air pressure, for example in a spacecraft
2. a small amount of air in a pipe that stops liquid flowing through it