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

Example Sentences

“In the Arctic, if you have very challenging weather conditions and no line of sight, then jamming can be critical,” Andreassen said.

From The Wall Street Journal

These objects sat in my line of sight as I dressed for school and did my homework.

From The Wall Street Journal

Companies with a clear line of sight on AI profits are being rewarded, while those with weaker balance sheets and debt-paced business models are losing ground.

From Barron's

The lack of a clear line of sight to partnership is making them more likely to move on.

From The Wall Street Journal

I move the crust out of its line of sight, only for it to give another excited “Woo!”

From Literature