Definition of no-knock in English:

no-knock

adjective

US
  • Denoting or relating to a search or raid by the police made without warning or identification.

    ‘during a no-knock raid’
    • ‘The no-knock warrant is often accompanied by a ‘dynamic entry’ in which a cluster of police kick the door and rush within hooting and howling at the tops of their voices.’
    • ‘Here he encountered the tale of a man murdered by police in a controversial no-knock raid.’
    • ‘During the debate on the Patriot Act, I rose on the House floor to remind my colleagues that secret courts, no-knock searches, and nationwide warrants were all things our founding fathers had fought to gain their freedom from.’
    • ‘There are lots of invasive searches discussed here - car searches, work place searches, no-knock searches, secret searches, border searches - all of whose guidelines do little to protect personal privacy.’
    • ‘Agents may need to conduct no-knock searches in computer crime cases because technically adept suspects may ‘hot wire’ their computers in an effort to destroy evidence.’
    • ‘How credible are cops' and prosecutors' rationalizations for no-knock searches going to be after people start blogging videos (preferably with sound) of what actually happens during these official home-invasions?’
    • ‘It would take a team of NASA scientists to calculate when a no-knock entry or a brief wait would be appropriate using this calculus.’

Pronunciation

no-knock

/ˌnōˈnäk/