0 a large group of devices connected to the internet that are all running bots (= computer programs that work automatically), that can be used to send spam (= unwanted electronic messages), or attack other computers and cause them to stop working correctly: --
A bot army can be utilized for a number of dishonest purposes, chief amongst them misrepresenting public sentiment about whichever topics the controller has interest in.
The tool simplifies the process of building bot armies controlled by specially created Twitter accounts.
They reported a bot army of over 300,000 infected machines sending out alarming amounts of pharmaceutical spam.