Source : Free On-Line Dictionary of Computing

domain engineering
     
         1. The development and evolution of
        {domain} specific knowledge and artifacts to support the
        development and evolution of systems in the domain.  Domain
        engineering includes engineering of {domain models},
        components, methods and tools and may also include {asset
        management}.
     
        2. The engineering process of analysing and modelling a
        domain, designing and modelling a generic solution
        architecture for a product line within that domain,
        implementing and using reusable components of that
        architecture and maintaining and evolving the domain,
        architecture and implementation models.
     
        3. A reuse-based approach to defining the scope ({domain
        definition}), specifying the structure ({domain architecture})
        and building the Assets (requirements, designs, software code,
        documentation) for a class of systems, subsystems or
        applications.  Domain engineering can include domain
        definition, domain analysis, developing the domain
        architecture domain implementation.