Definitions for backsight
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Wiktionary
backsight(Noun)
The rear sight of a firearm.
backsight(Noun)
A measurement or reading taken back towards a point of known elevation, used to calculate the height of the theodolite.
backsight(Noun)
A measurement of a previously shot point, used to set the angle to zero when occupying a new position.
backsight(Verb)
To shoot a backsight.
Origin: From the back + sight
Webster Dictionary
Backsight(noun)
the reading of the leveling staff in its unchanged position when the leveling instrument has been taken to a new position; a sight directed backwards to a station previously occupied. Cf. Foresight, n., 3
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