tyre Definition

tyre
tire
noun

1. A rubber ring that fits around the outside edge of the wheel of a vehicle such as a bicycle, pram, wheelbarrow, etc to give traction and help minimize the effect of bumps and hollows in road surfaces.
2. A type of hollow rubber tyre that has an inner tube filled with compressed air and a tread that is specially designed to provide good roadholding and efficient water dispersal in the rain.

Form: pneumatic tyre (in full)
3. A band of steel, iron, etc fitted around the rim of a cartwheel or the wheel of a railway vehicle to strengthen it.

Etymology: 18c: a variant of 15c tire a headdress, from attire.