[countable] (IT 信息技术) a computer program that receives data and processes it according to particular rules before displaying it, or sending it somewhere to stop particular things from being seen过滤程序◆You can set up filters to manage your incoming and outgoing emails.可以安装过滤程序来管理收发的电子邮件。◆We use a web filter to block access to certain websites.我们用网络过滤器来封锁某些网站。