Dimension is a fundamental concept in mathematics and physics that refers to the measurable extent of an object or space.
In everyday language, dimension can mean:
1. A measurable extent (length, width, height)
2. An aspect or feature of a situation
3. In science fiction, an alternate universe or reality
4. In mathematics, the number of coordinates needed to specify any point within it
5. In physics, a basic physical quantity (like mass, length, time)