From Longman Dictionary of Contemporary Englishfire engineˈfire ˌengine noun [countable] 
TTCa special large vehicle that carries equipment and the people that stop fires burning, especially the equipment that shoots water at a fire SYN fire truck American English
TTCa special large vehicle that carries equipment and the people that stop fires burning, especially the equipment that shoots water at a fire SYN fire truck American EnglishExamples from the Corpus
fire engine• The bike is shiny as a fire engine, looking showroom fresh thanks to Horne.• The Characters A fire engine, an ambulance, and a police car.• One night she heard an ambulance approach the hospital and mistook it for a fire engine.• Look, there goes a fire engine.• Somewhere, the bell of a fire engine clanged and men's voices called urgently. 