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

The French civil aviation authority and the European Union Aviation Safety Agency have both granted permission for HyLight’s airships—which have so far logged more than 750 flight hours—to operate beyond visual line of sight. — Edd Gent, IEEE Spectrum, 29 Oct. 2026

Importantly, the drones were operated beyond visual line of sight (BVLOS), meaning drone operators didn’t need to keep visual contact with the drones. — Christopher McFadden, Interesting Engineering, 10 Oct. 2026

Positioned directly within the driver's line of sight, the display is split into several sections. — New Atlas, 7 Oct. 2026

These events are called quasars, but when the jets are directed straight down our line of sight, the quasar is classified as a blazar. — Robert Lea, Space.com, 7 Oct. 2026

Word History

First Known Use

1559, in the meaning defined at sense 1

Rhymes for line of sight

• actinolite
• adipocyte
• amphibolite
• anorthosite
• anthophyllite
• aragonite
• carbonatite
• cassiterite
• chalcopyrite
• cristobalite
• crocidolite
• diatomite

Medical Definition

line of sight

noun

1

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

2

: line of vision