botnet — English Dictionary

Noun

1. A collection of compromised computers that is gradually built up and then unleashed as a DDOS attack or used to send very large quantities of spam.

   Usage

   • Internet

   Examples

   Then they blacklisted addresses used by spammers. In response, senders started using botnets (networks of otherwise innocent computers).

2. spyware

   Examples

   Google Chrome is botnet, use Firefox instead