rebore noun 1verb 1forms 3 noun1 •The process of modifying the bore of an engine.However, any increase in capacity is useful and, if an engine is worn and needs a rebore, it's worth considering boring to a near maximum size rather than simply having it bored to the next oversize. — 2005 verb1 •To bore through an existing hole, generally to correct its shape, or to enlarge.If you want to keep using that rifle, you'll have to rebore the barrel.The cylinders of your engine are so worn the rings don't seal any more; you have to have it rebored to stop it from burning oil. formsrebored · reboring · rebores
