rebore

rebore verb: to bore through an existing hole, generally to correct its shape, or to enlarge. Also the simple past and past participle of rebear.

Verb

rebore (third-person singular simple present rebores, present participle reboring, simple past and past participle rebored)

(transitive) 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.

Noun

rebore (plural rebores)

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, Daniel Stapleton, How to Plan and Build a Fast Road Car, page 14

Also used as

rebore is also the simple past and past participle of rebear.

Forms of rebore

Verb
third-person singular present	rebores
present participle	reboring
past participle	rebored
past	rebored
Noun
plural	rebores

Origin of rebore

From re- + bore.

Questions about rebore

What does rebore mean?: Rebore means to bore through an existing hole, generally to correct its shape, or to enlarge.
What part of speech is rebore?: Rebore can be a verb or a noun.
What is the past tense of rebore?: The past tense of rebore is rebored.

Words near rebore in the dictionary

Adapted from Wiktionary: rebore (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Cite this entry: “rebore.” Word.ws, https://word.ws/rebore. Based on Wiktionary, CC BY-SA 4.0.