Engineering is the discipline, art, science as well as profession of acquiring as well as applying scientific, mathematical, economic, social, as well as practical cognition to design and build structures, machines, devices, systems, materials and processes that safely realize improvements to the lives of people.
The American Engineers' Council for Professional Development (ECPD, the predecessor of ABET has defined "engineering" as:
The creative application of scientific principles to blueprint or railroad train structures, machines, apparatus, or manufacturing processes, or plant utilizing them singly or inwards combination; or to laid or operate the same amongst sum cognizance of their design; or to forecast their bespeak nether specific operating conditions; all every minute respects an intended function, economic science of functioning as well as security to life as well as property.