- a movable or folding seat, as in a carriage, taxicab, or limousine, used as an extra seat.
Origin of jump seat
An Americanism dating back to 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a folding seat for temporary use, as on the flight deck of some aircraft for an additional crew member
- British a folding seat in a motor vehicle such as in a London taxi