Oxford Dictionary English car boot sale nounnoun BrE BrE//ˌkɑː ˈbuːt seɪl// ; NAmE NAmE//ˌkɑːr ˈbuːt seɪl// (British English) Add to my wordlistjump to other resultsan outdoor sale where people sell things that they no longer want, using tables or the backs of their cars to put the goods onCheck pronunciation: car boot sale oxfordlearnersdictionaries.com