airstair

noun

air·​stair ˈer-ˌster 

plural airstairs

: a built-in or movable set of stairs that is used to allow people to enter and exit an aircraft

—often plural

The plate acted like a gate latch, preventing the airstairs from being lowered in flight.

—Steve Martini, The Rule of Nine, 2010

Word History

First Known Use

1960, in the meaning defined above

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