The Collaborative International Dictionary of English v.0.48:
Retread \Re*tread"\, v. t. & i. To tread again. [1913 Webster]WordNet (r) 3.0 (2006):
retread n 1: a used automobile tire that has been remolded to give it new treads [syn: retread, recap] v 1: use again in altered form; "retread an old plot" [syn: rework, make over, retread] 2: give new treads to (a tire) [syn: retread, remold, remould]