Definition By The Free Dictionary
The application of scientific and mathematical principles to practical ends such as the design, manufacture, and operation of efficient and economical structures, machines, processes, and systems.
also it can be defined as: The profession of or the work performed by an engineer.
Definition By The ECPD American Engineers' Council for professional Development
The creative application of scientific principles to develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct or operate the same with full cognizance of their design; or to forecast their behavior under specific operating conditions; all as respects an intended function, economics of operation or safety to life and property.
Engineering Books cover many topics related to the various branches
Branches of Engineering
The activities of Civil Engineering include the creation of plans and drawings, construction, and maintenance of the physical and natural built environments.
is the art of converting raw materials into more useful forms by the application of chemical, physical, and biological sciences.
The activities of Mechanical Engineering include the creation of plans and drawings, analysis and usage of heat and power produced by a machine for the operation of systems.
Electrical engineering comprises the study and application of electricity, electronics, and electromagnetism.
It is an interdisciplinary field of engineering that focuses on how to design and manage complex engineering projects over their life cycles.