An alternate dimension is a concept in science fiction and fantasy that refers to an alternative reality or universe where different versions of events, characters, or outcomes occur. It suggests that there are multiple possibilities for how things could have turned out, depending on various factors such as choices made by individuals or the result of certain events. The idea behind alternate dimensions is that they exist alongside our own reality but are separate from it and often remain hidden or inaccessible to most people. In popular culture, stories involving time travel or parallel universes often explore the concept of alternate dimensions, allowing readers and viewers to imagine what could have been if things had turned out differently.