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WordNet
zero-tolerance policy

n. any policy that allows no exception; "a zero-tolerance policy toward pedophile priests"

Usage examples of "zero-tolerance policy".

There's a strict zero-tolerance policy for weapons of mass destruction in this town.

Jude's has a famously zero-tolerance policy when it comes to sinners.

Still, as graduation approaches, the administration has imposed a zero-tolerance policy on disciplinary infractions.