horizon distance

American  

noun

1. Television.  the distance of the farthest point on the earth's surface visible from a transmitting antenna.

2. Radio.  the distance on the earth's surface reached by a direct wave: due to atmospheric refraction, sometimes greater than the distance to the visible horizon.

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Example Sentences

"It's big enough to be spotted at horizon distance."

From Project Gutenberg

We were this day once more cheered by the sight of rising ground; Macquarie's Range just appearing above the horizon, distance about forty miles; and we felt that we were again about to tread on secure and healthy land, with a chance of procuring some sort of game, which would now be very acceptable, our diet being entirely confined to pork and our morsel of bread.

From Project Gutenberg