A "Universum" refers to a distinct universe or realm that exists within a broader multiverse framework. Each universum can have its own set of physical laws, dimensions, and properties, allowing for diverse forms of existence and experiences. This concept is often explored in theoretical physics and cosmology, where scientists study the implications of multiple universes. In popular culture, the idea of universums is frequently depicted in science fiction, where characters may travel between different realities. Notable examples include the Marvel Cinematic Universe and DC Multiverse, which showcase various universes with unique storylines and characters.