scareware Syllabification: (scare·ware)Pronunciation: /ˈske(ə)rˌwe(ə)r/Definition of scareware noun informal malicious computer programs designed to trick a user into buying and downloading unnecessary and potentially dangerous software, such as fake antivirus protection: another worrying finding of the report is the huge increase in scarewarescareware in other Oxford dictionaries Definition of scareware in the British & World English dictionary