Definition of backsight

1 surveying : a reading of the leveling rod in its unchanged position when the leveling instrument has been taken to a new position
2 surveying : a sight directed backward to a previous station

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First Known Use of backsight

1847, in the meaning defined at sense 1

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The first known use of backsight was in 1847

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Cite this Entry

“Backsight.” Dictionary, Merriam-Webster, Accessed 15 Jul. 2020.

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