DEFINITION: Enterprise Service Bus ABB is a Communication Network implementing a communication system between mutually interacting software applications in a service-oriented architecture (SOA). It represents a software architecture for distributed computing, and is a special variant of the more general client-server model, wherein any application may behave as server or client. ESB promotes agility and flexibility with regard to high-level protocol communication between applications. Its primary use is in enterprise application integration (EAI) of heterogeneous and complex service landscapes. Source: Definitions (https://www.definitions.net/definition/Enterprise%20service%20bus?msclkid=63dd934ebbf311eca3b91aacefa765b0)