rumble seat noun
plural rumble seats
plural rumble seats
Learner's definition of RUMBLE SEAT
[count] US, old-fashioned
: a seat in the back of a car that folds down and is not covered by the top（旧式汽车车厢后面的）无顶折叠座位，敞开座位 ◊ Rumble seats were most common in cars made during the 1920s and 1930s.无顶折叠座位最常见于20世纪20和30年代制造的汽车。