Definitions:

1. A rule or regulation that establishes unequivocally that certain behaviors or actions will not be tolerated under any circumstances. NOUN
   • As part of their commitment to safety, the airport maintains a zero-tolerance policy for weapons of any kind.
2. A strict enforcement rule where any violation of a rule result in immediate and predetermined punishment, regardless of the circumstances or severity of the offense. NOUN
   • The company enforces a zero-tolerance policy on workplace harassment- any violation leads to immediate termination.
3. Any policy that allows no exception. NOUN
   • The city's zero-tolerance policy for littering aims to maintain a clean environment for all citizens.