Research is often described as an active, diligent, and systematic process of inquiry aimed at discovering, interpreting and revising facts. This intellectual investigation produces a greater understanding of events, behaviors, or theories, and makes practical applications through laws and theories. The term research is also used to describe a collection of information about a particular subject, and is usually associated with science and the scientific method.

The word research derives from Middle French (see French language); its literal meaning is 'to investigate thoroughly'.