Definition from Wiktionary, the free dictionary
dragnet (plural dragnets)
- A net dragged across the bottom of a body of water.
- Heightened efforts by law-enforcement personnel to capture suspects.
2013 July 26, Leo Hickman, “How algorithms rule the world”, The Guardian Weekly, volume 189, number 7, page 26:
- The use of algorithms in policing is one example of their increasing influence on our lives. […] who, if anyone, is policing their use[?] Such concerns were sharpened further by the continuing revelations about how the US National Security Agency (NSA) has been using algorithms to help it interpret the colossal amounts of data it has collected from its covert dragnet of international telecommunications.
- To make heightened efforts to catch a suspect.