Definition of engineering geology Engineering geology is about applying all branches of the geosciences which mainly comprise of components and inner-structure of Crust to resolve problems of engineering projects,and in all of its stages,include planning,designing, building and operation.Definition of engineering geology : Engineering geology is about applying all branches of the geosciences which mainly comprise of components and inner-structure of Crust to resolve problems of engineering projects, and in all of its stages, include planning, designing, building and operation