airlock

/ ˈɛəˌlɒk /

noun

1. a bubble in a pipe causing an obstruction or stoppage to the flow
2. an airtight chamber with regulated air pressure used to gain access to a space that has air under pressure

Example Sentences

As the lorry drove towards the airlock - a secure area between the inner and outer gates of the prison - Khalife heard one of the kitchen staff asking: “Where is that young boy?”

From BBC

As Dragon doesn't have an airlock, the crew were exposed to the vacuum of space during the spacewalk.

From BBC

In recent decades astronauts used an airlock that separates most of a craft from the space vacuum outside - but this SpaceX Dragon capsule was in effect entirely exposed to space outside.

From BBC

Due to the lack of an airlock on the Crew Dragon, the 13-foot-wide capsule will be depressurized and exposed to space during the walk.

From Los Angeles Times

The moment that struck her the most was leaving the airlock for underwater space walk simulation when the instructor said, “Welcome to space.”

From Seattle Times