The DC Universe (DCU) is the shared universe in which most stories in American comic book titles published by DC Comics take place. In context, the term "DC Universe" usually refers to the main DC continuity. It contains various superheroes such as Superman, Batman, Wonder Woman, Aquaman, and Flash; as well as teams such as the Justice League, the Suicide Squad, and the Teen Titans. It also contains well-known supervillains, including Joker, Lex Luthor, Cheetah, Reverse-Flash, and Darkseid.
Beyond the main continuity, the DC Multiverse encompasses all alternate realities within DC Comics. The primary universe has been known by various names over time, with recent designations including "Prime Earth" or "Earth 0" (distinct from "Earth Prime"). The DC Universe and its alternate realities have been adapted across multiple media, including film serials, radio dramas, and modern films, with ongoing efforts to address the complex continuity through streamlined storylines and events.