natural horizon


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natural horizon

The circle around the observer where the earth and the sky appear to meet. Also called a visual horizon or an apparent horizon.
References in periodicals archive ?
It can happen when visibility is reduced to zero, or whenever the natural horizon is not clear enough to control the airplane by visual references.
Based on that information, we were confident a natural horizon would be present.
This was one of those nights where the natural horizon wasn't all that apparent, due to the moist, summer haze over south Florida extending up to my altitude, plus the number and size of the buildups.
Through its focus on the sea, it will seek "to reinstate Palestine's presence in its own history and geography, and to restore its relationship with its natural horizons and with the rest of the world.

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