Oxford Dictionary English firecracker noun noun BrE BrE//ˈfaɪəkrækə(r)// ; NAmE NAmE//ˈfaɪərkrækər// Add to my wordlistjump to other resultsa small firework that explodes with a loud noise to let/set off firecrackersSee firecracker in the Oxford Advanced American DictionaryCheck pronunciation: firecracker oxfordlearnersdictionaries.com