The benefit derived from an interaction or cooperation of two or more source, organizations, substances, or other agents to produce a combined effect distinct from and greater than the sum of their separate parts or effects.

The term synergy comes from the Attic Greek word συνεργία (synergia), derived from συνεργός(synergos), which means working together. A synergy may be conceptual/philosophical, human, corporate, economic, biological or chemical in nature. This in contrast to a case in which the sources, organizations, substances, or other agents  provide no greater combined effect, in which case the result is said to be a ”redundancy.”