Definition of "boresight" []

• The optical axis of a directional antenna. (noun)

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• "So I accepted the rifle, filled out the ATF form, had the gunshop mount and boresight a Leupold Mark II compact 3x9 scope (very lightweight, but good optics quality), affixed a sling to the rifle, and took the 8lb, 1 oz. fully-equipped rifle home."
• "So on the way home I thought about his book and realized that the gentleman had tried to boresight my rifle at 26 yds and with the obj.,, lense set at 1000yd the crosshairs will move."
• "While down to the LGS everyone was getting their deer rifles boresighted, so like a dummy i reached over and told the gent. to boresight mine."