line of sight

American  

[lahyn uhv sahyt] / ˈlaɪn əv ˈsaɪt /

noun

1. Also called line of sighting. an imaginary straight line running through the aligned sights of a firearm, surveying equipment, etc.

2. Astronomy. an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body.

3. 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.

4. Ophthalmology. line of vision.

5. sightline.

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line of sight British  

noun

1. the straight line along which an observer looks or a beam of radiation travels

2. ophthalmol another term for line of vision

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Etymology

Origin of line of sight

First recorded in 1550–60

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Example Sentences

See Examples For:

line of sight

Raymond James analyst Melissa Fairbanks pointed to Micron’s commentary on having no line of sight into when supply can catch up to demand.

From MarketWatch ● Oct. 1, 2026

It was traveling along the line of sight at more than 6,000 kilometers per second, indicating that a densely bound structure may have survived the initial blast and was now moving rapidly toward us.

From Science Daily ● Aug. 16, 2026

“Even as we expect industry supply to improve gradually in 2028, we currently do not have line of sight as to when memory supply will be able to catch up with increasing demand.”

From Barron's ● Jun. 26, 2026

The sector is in a much better position and there is more line of sight to quantum really becoming a reality, a senior Commerce Department official said.

From The Wall Street Journal ● May 21, 2026

The denial rang out loud and powerful, and Moss wished he could see how many people were beyond his line of sight.

From "Anger Is a Gift" by Mark Oshiro

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