Definitions from Wiktionary ( )

▸ verb:  To replace the traction-providing surface of a vehicle that employs tires, tracks or treads.
▸ verb:  (chiefly UK) To renew the tread of a tyre, providing a cheaper alternative to buying a new tyre, but potentially introducing a risk of premature failure if performed improperly.
▸ noun:  A used tire whose surface, the tread, has been replaced to extend its life and use.
▸ noun:  (military, slang) A person who re-entered military service in World War II after serving in World War I.
▸ verb:  (transitive) To tread again, to walk along again, to follow a path again.
▸ noun:  (sometimes figurative) A return over ground previously covered; a retraversal or repetition.

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