1. A closed automobile having two or four doors and a front and rear seat.
2. A portable enclosed chair for one person, having poles in the front and back and carried by two other people; a sedan chair.

In the 17th and 18th centuries, an enclosed chair carried by porters at the front and the back on two long poles passed through handles on the sides of the box.

3. Etymology: of uncertain origin; however, it has been suggested that the word was borrowed from a Southern Italian dialect and is a derivative of sede, "chair"; from Latin sedes which is related to sedere, "to sit".