Complexity Explorer Santa Few Institute

A macrostate is a unique, discrete, and observable characteristic or property of a defined entity or system. Macrostates are considered the “ensemble” expression that correspond to an ensemble of microstates. For example, in classical thermodynamics the macrostates of matter defined by temperature, pressure, and volume can correspond to a huge number of microstates, each defined by the positions and velocities of  large numbers of individual particles that comprise the gas, liquid, or solid.