line of sight
Americannoun
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Also called line of sighting. an imaginary straight line running through the aligned sights of a firearm, surveying equipment, etc.
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Astronomy. an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body.
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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.
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Ophthalmology. line of vision.
noun
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the straight line along which an observer looks or a beam of radiation travels
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ophthalmol another term for line of vision
Etymology
Origin of line of sight
First recorded in 1550–60
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“Overall, we have seen improving order book trends in the second quarter, which gives greater line of sight to deliver on our full-year outlook,” Chief Executive Mike Radossich said.
From The Wall Street Journal • May 15, 2026
Always in each other’s line of sight, always negotiating space that didn’t exist.
From Los Angeles Times • Apr. 3, 2026
Additionally, Arcuri said he doesn’t think Intel would’ve retaken ownership of the Ireland fab if it didn’t have “a good line of sight over potential foundry wins.”
From MarketWatch • Apr. 2, 2026
For the entire tour Allen stood at the safety barriers, maintaining radio contact with his team and never leaving the band's line of sight.
From BBC • Mar. 21, 2026
Maybe she has to be herself at all costs, no matter who is standing in her line of sight.
From "Starfish" by Akemi Dawn Bowman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
