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

A seat on public transport reserved for use by people with disabilities, the elderly, pregnant women and others in need.

(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.

A legislative seat distribution, used to guarantee that a party gets their fair share of seats, when a party is entitled to fewer seats as a result of party votes than it has won constituencies. Additional seats granted to that party would be overhang seats.

The flap for defecation in a union suit.

(automotive) A seat in a vehicle for a passenger, especially the front seat next to the driver in a motor vehicle.

A child safety seat that raises the vertical position of the user to allow a safer use of regular car seat belts.

plural of seat post

A metal tube that connects a bicycle saddle, usually by means of a saddle clamp, to a frame.

The provision of seating or tables without reservations.