| Noun | 1. | car boot sale - an outdoor sale at which people sell things from the trunk of their car cut-rate sale, sales event, sale - an occasion (usually brief) for buying at specially reduced prices; "they held a sale to reduce their inventory"; "I got some great bargains at their annual sale" Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom |