line of sight

noun phrase

1
: a line from an observer's eye to a distant point
2
: the line between two points
specifically : the straight path between a transmitting antenna (as for radio or television signals) and a receiving antenna when unobstructed by the horizon

Examples of line of sight in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The investigation determined that Castillo used his control panel to unlock the third inmate’s cell, and in his line of sight, the pair pulled open the door, entered the cell and proceeded to punch and kick the victim. Robert Salonga, Mercury News, 19 May 2026 The area offers a clear line of sight of Space's Starbase test site (as well as the boats sailing around Port Isabel, which is nice). Tariq Malik, Space.com, 18 May 2026 An absolute must for referees at corners is to have a line of sight to the goalkeeper. Graham Scott, New York Times, 11 May 2026 However, for the best view, choose a location with a clear, unobstructed view of the western horizon, free from buildings, trees, or hills that could block your line of sight while the planet is still relatively low. Valerie Mesa, PEOPLE, 6 May 2026 See All Example Sentences for line of sight

Word History

First Known Use

1559, in the meaning defined at sense 1

Time Traveler
The first known use of line of sight was in 1559

Browse Nearby Words

Cite this Entry

“Line of sight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/line%20of%20sight. Accessed 22 May. 2026.

Medical Definition

line of sight

noun
1
: a line from an observer's eye to a distant point
2
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