horizon
Nouns
- (n) the line at which the sky and Earth appear to meet apparent horizon, sensible horizon, visible horizon, skyline,
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(n) the range of interest or activity that can be anticipated
- It is beyond the horizon of present knowledge
- (n) a specific layer or stratum of soil or subsoil in a vertical cross section of land
- (n) the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth celestial horizon,