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1. The line at which the sky and Earth appear to meet
   - apparent horizon, visible horizon, sensible horizon, skyline
    
2. The range of interest or activity that can be anticipated
   "It is beyond the horizon of present knowledge";
   - view, purview
    
3. A specific layer or stratum of soil or subsoil in a vertical cross section of land
    
4. The great circle on the celestial sphere whose plane passes through the sensible horizon and the centre of the Earth
   - celestial horizon

Derived forms: horizons

Type of: ambit, compass, great circle, line, orbit, range, reach, scope, stratum

Part of: linear perspective, perspective, profile

Encyclopedia: Horizon, Saskatchewan