line of sight
- an imaginary straight line joining the center of the eye of the observer with the object viewed
- Radio, TV the straight path from a transmitting antenna to the horizon, representing the normal range of high-frequency wave propagation
See line of sight in American Heritage Dictionary 4
noun pl. lines of sight - An imaginary line from the eye to a perceived object.
- An unobstructed path between sending and receiving antennas.
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