a car with four doors and a boot (= space at the back for carrying things) which is separated from the part where the driver and passengers sit 小轿车；（三厢四门）轿车 
Oxford Collocations DictionarySedan is used after these nouns:- luxury
Word Originperhaps an alteration of an Italian dialect word, based on Latin sella ‘saddle’, from sedere ‘sit’.
