1. bore sight - Noun
2. bore sight - Verb
(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.
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.