Try Our Apps
Dictionary.com

follow Dictionary.com

Famous Last Words

line of sight

See more synonyms on Thesaurus.com
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.
Origin of line of sight
1550-1560
First recorded in 1550-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
British Dictionary definitions for line of sight

line of sight

noun
1.
the straight line along which an observer looks or a beam of radiation travels
2.
(ophthalmol) another term for line of vision
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source

Word of the Day

Difficulty index for line of sight

Few English speakers likely know this word

Word Value for line

4
6
Scrabble Words With Friends

Nearby words for line of sight

Heartbreak