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zero-day

Syllabification: ze·ro-day

Definition of zero-day in English:

adjective

Computing
Deriving from or relating to a previously unknown vulnerability to attack in some software: the service is designed to detect all manner of malware, including zero-day threats
More example sentences
  • There were unexpected zero-day attacks causing a half-day network outage.
  • Last week, the company warned the public of a "zero-day" attack that acts upon certain weaknesses in the program.
  • The amalgamation of zero-day threats, compliance demands, and still more problems pushes corporations to address the most pressing challenges first.

Definition of zero-day in:

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