Definition of denial of service in US English:

denial of service

(also DoS)


  • An interruption in an authorized user's access to a computer network, typically one caused with malicious intent.

    • ‘The nature of this attack ranges from denial of service to a sophisticated scan of the Internet for potential targets for future compromise.’
    • ‘But in a shift from previous years, the second-most expensive computer crime among survey respondents was denial of service.’
    • ‘A new breed of security products designed to mitigate the risk of denial of service attacks is coming to market.’
    • ‘‘It would seem that it would be easy to cause a denial of service by shutting off storage devices,’ says Wysopal.’
    • ‘The two main types of attacks were website defacement and distributed denial of service.’