+The **fourth dimension** is a concept extending beyond the three spatial dimensions of length, width, and height. It is most commonly interpreted as [Time](/wiki/time), forming the fabric of [Space](/wiki/space)-time in physics. Mathematically, it represents an additional axis orthogonal to all others.
+## See also
+- [Dimensions](/wiki/dimensions)
+- [Relativity](/wiki/relativity)
+- [Geometry](/wiki/geometry)
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