spyware
noun [ U ] uk/ˈspaɪ.weər/ us/ˈspaɪ.wer/
间谍软件（一种计算机程序，监视人们使用计算机的情况，然后将这种信息通过英特网发送）
software that collects information about how someone uses the internet, or personal information such as passwords, without the user knowing about it