overbore

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From over- +‎ bore.

overbore (not comparable)

1. (firearms) Such that the capacity of the burning cartridge powder is greater than the volume within the barrel.

overbore (third-person singular simple present overbores, present participle overboring, simple past and past participle overbored)

1. (firearms, transitive) To modify so that the capacity of the burning cartridge powder is greater than the volume within the barrel.

• backbore

overbore

1. simple past and past participle of overbear

• overrobe