jump seat

American  

noun

1. a movable or folding seat, as in a carriage, taxicab, or limousine, used as an extra seat.

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jump seat British  

noun

1. a folding seat for temporary use, as on the flight deck of some aircraft for an additional crew member

2. a folding seat in a motor vehicle such as in a London taxi

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Etymology

Origin of jump seat

An Americanism dating back to 1860–65

Example Sentences

The Alaska Airlines pilot, who was riding in a jump seat on the flight deck, currently faces state and federal charges related to the incident.

From Seattle Times

Mr. Emerson was off duty during the flight, and was riding in the cockpit jump seat.

From New York Times

Sitting in the cockpit jump seat, Emerson told the pilots, “I’m not OK.”

From Seattle Times

The Horizon close call could result in the re-examination of the practice of letting off-duty pilots or other airline employees sit in the cockpit jump seat.

From Seattle Times

Emerson had been flying in the “jump seat,” a foldout seat usually placed behind the captain’s seat, according to experts.

From Los Angeles Times