1. Not balanced or regularly arranged on opposite sides of a line or around a central point.
2. Lacking equality, balance, or harmony and so not having the same shape and size on both sides.
3. In chemistry, a reference to a carbon atom which has four different atoms or structural groups attached to it, resulting in an unbalanced spatial arrangement of atoms in a molecule, so that the molecule cannot be superimposed on its mirror image.
4. In electrical engineering with varying conductivity or a description of a substance or a device that exhibits varying or different conductivities for electric currents flowing through it in different directions.
5. A description of an aircraft which is unbalanced because of an unequal thrust from two or more sources; such as, when one engine of a pair is not functioning properly.

Pelvic obliquity caused by either a discrepancy in leg length or fixed lumbar scoliosis.