(transport) A unit of measure of passenger carrying capacity, equal to the number of seats available multiplied by the number of miles flown.

(slang, vulgar) The position of sitting on the rear of a motorcycle, behind the person driving; pillion. / (slang, vulgar) The middle seat in a car, especially the one in the front next to the driver.

(idiomatic) alternative form of in the driver's seat

plural of window-seat

plural of seat cushion

plural of seat of ease

(euphemistic, obsolete) A toilet.

plural of banana seat

(mythology) Synonym of Siege Perilous

plural of ejector seat