line of sight

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Definitions of line of sight words

noun line of sight Also called line of sighting. an imaginary straight line running through the aligned sights of a firearm, surveying equipment, etc. 1
noun line of sight Astronomy. an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body. 1
noun line of sight 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. 1
noun line of sight Ophthalmology. line of vision. 1
noun line of sight sightline. 1
noun line of sight straight line of view 1

before 1550

One of the 31% oldest English words

First recorded in 1550-60

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 6% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

This diagram is provided by Google Ngram Viewer

beeline — the most direct route between two places (esp in the phrase make a beeline for)
view — an instance of seeing or beholding; visual inspection.
line of vision — a straight line that connects the fovea centralis of an eye with the point on which the eye focuses.
sightline — any of the lines of sight between the spectators and the stage or playing area in a theater, stadium, etc.: Some of the sightlines are blocked by columns.
visible horizon — horizon (def 1).