mac·ro·cosm \ˈmakrəˌkäzəm\noun (-s) Etymology: French macrocosme, from Medieval Latin macrocosmos, macrocosmus, from macr- + Greek kosmos order, universe 1.: the great world : the universe in its entirety — contrasted with microcosm 2.: a complex regarded as a whole world in itself < to consider the state as the macrocosm of the family > < the great macrocosm of pain — Henry Miller >