In statistical mechanics, a microstate describes a specific detailed microscopic configuration of a system, that the system visits in the course of its thermal fluctuations. In contrast, the macrostate of a system refers to its macroscopic properties such as its temperature and pressure. In statistical mechanics, a macrostate's characterized by a probability distribution on a certain ensemble of microstates. This distribution describes the probability of finding the system in a certain microstat… (More on Macrostate)