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line of sight
Word Origin
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
Expand
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
Expand
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
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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
line of fire, in the
line of fixation
line of induction
line of position
line of scrimmage
line of sight
line of site
line of vision
line officer
line one's nest
line one's pockets
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