What is Caravan ?
Caravan is (noun) 1. a vehicle which you can live in, e.g. on holiday, and which can be attached to a car and pulled along We got stuck behind a caravan on a narrow mountain road. We rent a caravan in a caravan park. (NOTE: The US term is trailer or mobile home.) 2. a group of animals or vehicles travelling together, one behind the other A caravan of camels crossing the desert. We joined a caravan of lorries going to Romania.
source: Easier English, Student Dictionary Upper Intermediate Level