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jump-seat
jump-seat n.
Brit. 
/ˈdʒʌmpsiːt/
, /ˈdʒʌmpsiːt/U.S. /ˈdʒəmpˌsit/
(a) a movable carriage-seat; also adj.n. (ellipt.) (a carriage) provided with such a seat which can be brought into use when required; (b) a folding seat in a motor car; also transferred./ˈdʒəmpˌsit/ΘΚΠ
society > travel > means of travel > a conveyance > vehicle > powered vehicle > parts and equipment of motor vehicles > [noun] > extra folding seat
rumble seat1819
jump-seat1864
dicky1900
rumble1908
mother-in-law seat1961
society > travel > means of travel > a conveyance > vehicle > cart, carriage, or wagon > carriage for conveying persons > [noun] > types of carriage > with movable seat
jump-seat1864
society > travel > means of travel > a conveyance > vehicle > cart, carriage, or wagon > carriage for conveying persons > [noun] > parts of > seat > movable
jump-seat1864
1864 Webster's Amer. Dict. Eng. Lang. Jump-seat, a carriage constructed with a movable seat;..a movable carriage-seat.
1864 Webster's Amer. Dict. Eng. Lang. Jump-seat, a., having a movable seat; as, a jump-seat rock-away.
1875 E. H. Knight Pract. Dict. Mech. Jump-seat,..a kind of open buggy which has a shifting seat or seats... It may be arranged as a double or single seat vehicle.
1931 Automotive Abstr. Aug. 238/2 Treatment of the jump-seat explains unique problems presented by this accessory.
1963 Mrs. L. B. Johnson White House Diary 24 Nov. (1970) 8 We all got into the same limousine—Mrs. Kennedy and Lyndon in the back seat, the Attorney General and I in the jump seats.
1972 Guardian 18 Sept. 14/1 I was sitting in the jump seat... We were racing through the city.
1973 Black Panther 6 Oct. 10/1 Only the jump seat for stewardesses was behind him.
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