Definition of "antiriot"

Thus, the administration was not in favor of an antiriot bill before Congress that was designed to curb militant blacks suspected of encouraging riots.

1990, Brigitte Lebens Nacos, The Press, Presidents, and Crises

...who told him that things were spiraling out of control in Edgehill and that the police were conducting antiriot maneuvers there.

2001, Neil Websdale, Policing the poor