Bore or Bores often refer to: Boredom. Drill. Relating to holes. Boring (manufacturing), a machining process that enlarges a hole. Bore (engine), the diameter of a cylinder in a piston engine or a steam locomotive. Bore (wind instruments), the interior chamber of a wind instrument. Gauge (firearms), the inner diameter of the barrel of a firearm. Nominal bore, a pipe size standard. Water well, known as a water bore in Australia. Places. Bore (woreda), a district of Ethiopia that includes the town of Bore. Bore, Emilia-Romagna, a commune in Emilia-Romagna, Italy.
https://en.wikipedia.org/wiki/Bore