Definitions
1.nounA used tire whose surface, the tread, has been replaced to extend its life and use.
2.nounA person who re-entered military service in World War Two after serving in World War One.
3.verbTo replace the traction-providing surface of a vehicle that employs tires, tracks or treads.
4.verbTo renew the tread of a tyre, providing a cheap, and possibly dangerous, product.
5.noun(sometimes figurative) A return over ground previously covered; a retraversal or repetition.
6.verbTo tread again, to walk along again, to follow a path again.