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

First Known Use of line of sight

1559

in the meaning defined at sense 1

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Medical Dictionary

line of sight

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

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