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.

---

Example Sentences

During inflation, regions that were very small and in contact with each other are suddenly blown up to be much larger and outside each other’s horizon distance.

From Textbooks • Oct. 13, 2016

One region of space separated by more than the horizon distance from another has been completely isolated from it through the entire history of the universe.

From Textbooks • Oct. 13, 2016

This distance is called that point’s horizon distance because anything farther away is “below its horizon”—unable to make contact with it.

From Textbooks • Oct. 13, 2016

If we measure the CMB in two opposite directions in the sky, we are observing regions that were significantly beyond each other’s horizon distance at the time the CMB was emitted.

From Textbooks • Oct. 13, 2016

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

From The Wailing Octopus by Goodwin, Harold L. (Harold Leland)