bore sight

== English == === Noun === bore sight (plural bore sights) (firearms) An optical device, mounted on or near the end of a firearm's barrel, used to align the sights with the bore. (firearms) A dummy cartridge containing a small battery-operated laser, used to align the sights. === Verb === bore sight (third-person singular simple present bore sights, present participle bore sighting, simple past and past participle bore sighted) (firearms) To align the sights and aiming point of a firearm using a bore sight optical tool. === Usage notes === Bore sighting is similar to, but not as accurate as, zeroing, which normally involves adjustments made to a sight after firing at a target.