What does line of sight mean?

Definitions for line of sight
line of sight

This dictionary definitions page includes all the possible meanings, example usage and translations of the word line of sight.

Princeton's WordNet

  1. line of sight, line of visionnoun

    an imaginary straight line along which an observer looks


  1. line of sightnoun

    A straight line along which an observer has a clear view.

  2. line of sightnoun

    The line which passes through the front and rear sight, at any elevation, when they are sighted at an object.


  1. Line of sight

    The line of sight, also known as visual axis or sightline (also sight line), is an imaginary line between a viewer/observer/spectator's eye(s) and a subject of interest, or their relative direction. The subject may be any definable object taken note of or to be taken note of by the observer, at any distance more than least distance of distinct vision. In optics, refraction of a ray due to use of lenses can cause distortion. Shadows, patterns and movement can also influence line of sight interpretation (as in optical illusions). The term "line" typically presumes that the light by which the observed object is seen travels as a straight ray, which is sometimes not the case as light can take a curved/angulated path when reflected from a mirror, refracted by a lens or density changes in the traversed media, or deflected by a gravitational field. Fields of study feature specific targets, such as vessels in navigation, marker flags or natural features in surveying, celestial objects in astronomy, and so on. To have optimal observational outcome, it is preferable to have a completely unobstructed sightline.


  1. line of sight

    Line of sight refers to a straight, unobstructed path that exists between a point of observation and a subject of view. It is often used in relation to visibility in visual arts, photography, broadcasting technology, military strategy, as well as in the field of physics. In wireless communication and satellite navigation systems, it denotes the direct radio path between the transmitter and receiver.


  1. Line of sight

    Line of sight, sometimes written line-of-sight or abbreviated to LoS, is a term used in wargames and some role-playing games. It refers to visibility on the playing field. Many abilities can only be used against an enemy within line of sight. In some games, miniature figures are used to determine line of sight. Many wargames use counters to represent units and determine line of sight. A common technique is to hold a length of thread between two counters. If the thread, held straight, doesn't encounter any obstacles, the line of sight is valid. The first computer game to implement line of sight graphics was Dungeon, which was played on a PDP-10 mainframe computer.

Military Dictionary and Gazetteer

  1. line of sight

    See Line of Metal and Pointing.

  2. line of sight

    See Pointing.

Matched Categories

How to pronounce line of sight?

How to say line of sight in sign language?


  1. Chaldean Numerology

    The numerical value of line of sight in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of line of sight in Pythagorean Numerology is: 7

Examples of line of sight in a Sentence

  1. Beth Zentmeyer:

    Wear comfortable shoes, no one is guaranteed a line of sight.

  2. Jeremy King:

    When he came toward the back door in her line of sight, she clipped him.

  3. Mike Wessel:

    Anything with a line of sight to a major U.S. government entity or security facility has to be a questionable part of the transaction and needs to be assessed by CFIUS.

  4. Mark Carney:

    This is a big package. It's a big package. It is a big deal to cut the CCYB by as much as the FPC did. It's a huge term funding certainty for the financial sector, 100 billion at bank rate, with additional incentives and potentially could be substantially increased depending on the lending path of the economy, and on top of it there are fiscal measures that are coming. We have direct line of sight of the relevant bits of the budget. That's part of the coordination.

  5. Ravneet Phokela:

    There is a line of sight now.

Translations for line of sight

From our Multilingual Translation Dictionary

  • BlickrichtungGerman
  • champ de visionFrench
  • 視線Japanese
  • linie de vedere, linie de vizareRomanian
  • линия визирования, линия обзора, луч обзораRussian
  • syftlinje, syftningslinje, siktlinjeSwedish

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"line of sight." Definitions.net. STANDS4 LLC, 2024. Web. 14 Jul 2024. <https://www.definitions.net/definition/line+of+sight>.

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