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

Such an eruption would release a cloud of dense, magnetized plasma, temporarily altering the space around the FRB source as it passed through the line of sight.

From Science Daily

“There’s a lot of work in progress, and we’ll evaluate as we get clearer line of sight,” he says.

From The Wall Street Journal

“With line of sight on the terminal level of Fed Funds this cycle and hopefully a stabilizing labor market, we believe the banks should continue their outperformance,” the firm wrote in a note last week.

From Barron's

Once that region rotates away from our line of sight, it disappears from view for another two weeks before returning.

From Science Daily

The Greater Manchester Baccalaureate aims to give young people a clear line of sight to high-quality jobs in sectors that are growing in the local economy.

From BBC