Bore (bōr), n. 1. A hole made by boring; a perforation.
2. The internal cylindrical cavity of a gun, cannon, pistol, or other firearm, or of a pipe or tube.
The bores of wind instruments.
Bacon.
Love's counselor should fill the bores of hearing.
Shak.
3. The size of a hole; the interior diameter of a tube or gun barrel; the caliber.
4. A tool for making a hole by boring, as an auger.
5. Caliber; importance.
Yet are they much too light for the bore of the matter.
Shak.
6. A person or thing that wearies by prolixity or dullness; a tiresome person or affair; any person or thing which causes ennui.
It is as great a bore as to hear a poet read his own verses.
Hawthorne.