Definition of crack down on in English:

crack down on

phrasal verb

informal
  • Take severe measures against.

    ‘the police will crack down on criminals’
    • ‘The Executive has introduced measures through the police bill to crack down on knife culture.’
    • ‘The government has cracked down on more complex tax-avoidance schemes.’
    • ‘Where these are not cracked down on immediately then further, and worse, anti-social behaviour usually follows.’
    • ‘An Executive source said this was typical of the chaos it hoped the new commissioner would crack down on.’
    • ‘Its still illegal, but what this does mean is that the police are cracking down on the harder drugs, like cocaine and heroin.’
    • ‘Labour has taken tough measures to crack down on crime and anti-social behaviour.’
    • ‘Effective prevention of petty crimes such as theft will enable the police to focus their efforts on cracking down on hard crime.’
    • ‘Sydney police have promised to crack down on all such surreptitious snapping.’
    • ‘The relationship between citizens and police has changed since the police started cracking down on organized crime.’
    • ‘Police are cracking down on crime in Bradford and have secured reductions in the rates of burglary, robbery and car crime.’
    get tough on, take severe measures against, take stern measures against, clamp down on, come down heavily on
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