Oxford Dictionary English billy club nounnoun BrE BrE//ˈbɪli klʌb// ; NAmE NAmE//ˈbɪli klʌb// (North American English) The police Add to my wordlistjump to other results a short wooden stick used as a weapon by police officers See related entries: The policeSee billy club in the Oxford Advanced American DictionaryCheck pronunciation: billy club oxfordlearnersdictionaries.com