This whole site is meant to help answer that question. If you haven't explored our cool things yet, check those out and then come back to this page. The stuff below will make a lot more sense. There are other definitions of engineering if you want to see what others through history have thought. The World that Never Was Note that the definition above states that engineering is not science.
Science is about discovering the natural.
Engineering is creating the artificial. Engineers are often incorrectly identified as scientists because most people have studied some science in school and are at least familiar with science. Most people have not studied or even been introduced to engineering. Engineers as a group are probably the most creative people. Engineering creativity is directed at things.