line of sight
- 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.
- sightline.
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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. 2018
Examples from the Web for line of sight
Historical Examples
He started the fuel pumps winding up, and swung the ship to point normal to the line-of-sight to the jammer.
Pushbutton WarJoseph P. Martino
I'm inclined like everybody else to consider perception on a line-of-sight basis instead of on a sort of all-around grasp.
Highways in HidingGeorge Oliver Smith
There were other instruments in other line-of-sight positions, very far away.
Operation TerrorWilliam Fitzgerald Jenkins
line of sight
- the straight line along which an observer looks or a beam of radiation travels
- ophthalmol another term for line of vision
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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