1.Definition: a specific layer or stratum of soil or subsoil in a vertical cross section of land

Category: Places

2.Definition: the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth

Related Noun(s):celestial horizon

Category: Places

3.Definition: the line at which the sky and Earth appear to meet

Related Noun(s):apparent horizon, sensible horizon, skyline, visible horizon

Category: Places

4.Definition: the range of interest or activity that can be anticipated

"It is beyond the horizon of present knowledge"

Related Noun(s):purview, view

Category: General