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line of sight

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noun
Also called line of sighting. an imaginary straight line running through the aligned sights of a firearm, surveying equipment, etc.
Astronomy. an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body.
Radio. a straight line connecting two points sufficiently high and near one another so that the line is entirely above the surface of the earth.
Ophthalmology. line of vision.
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Origin of line of sight

First recorded in 1550–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use line of sight in a sentence

British Dictionary definitions for line of sight

line of sight

noun
the straight line along which an observer looks or a beam of radiation travels
ophthalmol another term for line of vision
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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