Definition requires relativity.

Relativity defines an equilibrium.

Equilibrium is definition. Definition is equilibrium.

A dimension which is not in equilibrium is undefined.

A non-equilibrium dimension is virtual.

Dimensions are in equilibrium when there is equal and opposite relativity. Dimensions are defined when there is equal and opposite relativity.

Dimensions pop into and out of being.

Dimension in and of itself is like one hand clapping.

Relative dimensions create position.