Science is a system that is used to find the most probable explanation for The Way Things Work.

Science is induction run through abductions to make theories.

Or, if you like, science is hypotheses run through experiments to make theories.

Science is often used as a replacement for religion, although they are designed to fulfill completely different needs. Science is a functional method of manipulating the world. It is differentiated from religion and magic by the fact that religion and magic are not required to be redesigned every time they don't work. Science is. In theory.