One of the schematic categories in the configurational system. Axiality relates to the way a quantity of space or time is structured according to a directed axis.

For example, the adjectives well and sick are points on an axis relating to health. On the axis, well is the endpoint, whereas sick is the remainder of the axis. This explains the different distribution of the closed class degree modifiers like almost and slightly. While it is possible to be slightly sick or almost well, it is not possible to be *slightly well or *almost sick. This follows from the axiality model because it is not possible to be 'slightly' at an endpoint, nor 'almost' on the journey towards that endpoint.