- to verify the alignment of the sights and bore of (a firearm).
Origin of boresight
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for boresight
Now, I don't know how they operate, if they do boresight any there or not.Warren Commission (11 of 26): Hearings Vol. XI (of 15)
The President's Commission on the Assassination of President Kennedy