Definition of rebore
rebored;
reboring;
rebores
: to bore an existing hole a second or subsequent time in order to widen it or to alter or improve its inner surfaces
- After three years in the desert dust, I have just had to rebore the engine (another $1,400).
- —Robert Lacville
- To convert the 3-inch Ordnance Rifle to a breechloader, manufacturers sawed off the breech and screwed in a new steel breech … . The steel breech was rebored to 3.18 inches to attain the desired projectile size.
- —Mitch Meador
