Mukhalingam (literally "linga with a face", mukhalinga) is a linga with one or more human faces.
The five faces relate Shiva to the classical elements, the directions, the five senses and five parts of the body.
These represent Shiva's five aspects: Sadyojata, Vamadeva, Aghora, Tatpurusha and Ishana.
A four-faced linga is said also to represent the five aspects of Shiva, the fifth aspect is center,
the shaft itself or is assumed to be emerging from the top of the shaft and denotes the formless Absolute.