A Sedan is a passenger car in a 3-box configuration with A, B, & C-pillar. The Passenger compartment features 2 rows of seats and adequate passenger space in rear compartment for adult passengers.
A Sedan seats 4 or more people and it has fixed roof of full-height up to the rear window. The Roof structures typically have a fixed B-pillar on sedan models. 4-door or 2-door sedans are most commonly vehicles in the market. In US, sedan term denote a car with fixed window frames. The 4-door sedan has either 2 or 3 side windows.
The word sedan is possibly derived from a southern Italian dialect derivative of Italian sedia “chair”.
In 1930, Convertible Sedan was used to describe a car with soft, fold-able top and toll-up windows like a convertible coupe.
In British English a car of this configuration is called a saloon. The engine compartment cover is the bonnet, the Cargo-compartment boot is at the rear. Hatchback Sedans are known as hatchbacks.