horizon distance

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.

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