As a Noun: 1. A measure of the amount of air in a tyre and therefore of how firm the tyre is. English = tyre pressure. Note: 1. The Auslan sign WHEEL and a depiction of a round wide object which is circular, such as the outside of the wheel, followed by the representation of a round object with pin and the Auslan sign GAUGE. Source of this recommended sign: Victorian College for the Deaf.