Interruption of service is a term used to describe when a service, such as a website or an app, is unavailable due to technical issues. In this case, the crossword solution for the term is NET, which stands for Network. NET is a term used to describe a group of computers and other devices connected together, allowing them to communicate with each other and share resources. When there is an interruption of service, it means that the network is not functioning properly, resulting in the service being unavailable.