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line of sight

   Also found in: Dictionary/thesaurus, Legal, Acronyms, Wikipedia 0.05 sec.

line of sight

An unobstructed view from transmitter to receiver. Satellite, infrared (IR) and microwave transmissions require line of sight between nodes, whereas portable phones, cellphones and wireless LANs (Wi-Fi) do not. Bar code systems must also have line of sight between the scanner and the printed bar codes on items. Contrast with RF.


line of sight [′līn əv ′sīt]
(electromagnetism)
The straight line for a transmitting radar antenna in the direction of the beam.
(science and technology)
A straight, unobstructed path or line between two points, as between an observer's eye and a target.


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Silent, and out of his line of sight in the kitchen, she frightened him.
 
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