horizon

Noun
  1. The line at which the sky and Earth appear to meet (synset 108603184)
    is a type of: line - a spatial location defined by a real or imaginary unidimensional extent
    is a part of: linear perspective, perspective - the appearance of things relative to one another as determined by their distance from the viewer
    same as: apparent horizon, sensible horizon, skyline, visible horizon
  2. The range of interest or activity that can be anticipated (synset 105135047)
    "It is beyond the horizon of present knowledge"
    is a type of: ambit, compass, orbit, range, reach, scope - an area in which something acts or operates or has power or control:
    same as: purview, view
  3. A specific layer or stratum of soil or subsoil in a vertical cross section of land (synset 108675749)
    is a type of: stratum - one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
    subtypes:
    • soil horizon - a layer in a soil profile
    • geological horizon - a layer of rock with a particular composition (especially of fossils); for dating the stratum
    is a part of: profile - a vertical section of the Earth's crust showing the different horizons or layers
  4. The great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth (synset 108603373)
    is a type of: great circle - a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center
    same as: celestial horizon

Other Searches