Definitions

1. noun

A device or chamber that controls the passage of air into or out of a spacecraft, building, or other enclosed space.

“The astronauts had to cycle through the airlock before entering the space station.”

2. noun

A device or mechanism that controls the flow of air into or out of a machine or system.

“The airlock in the engine helped to reduce the risk of explosion.”

3. noun

A room or chamber in a building, especially one used to enter or leave the building.

“The airlock in the old castle was used to enter the grand hall.”