What is horizon?

  • (noun): The range of interest or activity that can be anticipated.
    Example: "It is beyond the horizon of present knowledge"
    Synonyms: view, purview
    See also — Additional definitions below


The horizon (or skyline) is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that do not. At many locations, the true horizon is obscured by trees, buildings, mountains, etc., and the resulting intersection of earth and sky is called the visible horizon. When looking at a sea from a shore, the part of the sea closest to the horizon is called the offing. The word horizon derives from the Greek "ὁρίζων κύκλος" horizōn kyklos, "separating circle", from the verb ὁρίζω horizō, "to divide", "to separate", and that from "ὅρος" (oros), "boundary, landmark".

Read more about Horizon.

Some articles on horizon:

Linear (film) - Track Listing
... The film contains 11 tracks, 10 of which are from No Line on the Horizon ... "Winter", a track cut from No Line on the Horizon, is in the film while "I'll Go Crazy If I Don't Go Crazy Tonight" is not ... The film's running order is representative of No Line on the Horizon's track list as of May 2008 ...
... in the FAO World Reference Base for Soil Resources is a soil with a thin, dark surface horizon on a bleached subsurface horizon (an albic horizon) that tongues into a clay ... The Bt horizon has an irregular or broken upper boundary resulting from the tonguing of bleached soil material into the illuviation horizon ...
Horizon - Projective Geometry
... The horizon was identified as a central line in graphical perspective by Girard Desargues in his Perspective of 1636 ... He wrote The words on the level, level, parallel to the horizon are.. ... The words vertically, perpendicular to the horizon, and square to the horizon are also used to mean the same thing ...
Valley Metro (Phoenix) Bus Fleet - Fleet Descriptions - Retired
... LEDot signs that were replaced with Luminator Horizon signs in 2007 ... they had their Luminator LEDot signs replaced with Luminator Horizon signs ... In 2007 their LEDot signs were replaced with Luminator Horizon signs ...
Sunrise Nippon/Horizon
... "Sunrise Nippon/Horizon" (Sunrise日本/Horizon?, "Sunrise Japan/Horizon") is the second single and first double A-side single of Japanese boy band Arashi ...

More definitions of "horizon":

  • (noun): The great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth.
    Synonyms: celestial horizon
  • (noun): A specific layer or stratum of soil or subsoil in a vertical cross section of land.

Famous quotes containing the word horizon:

    However closely people are attached to one another, their mutual horizon nonetheless includes all four compass directions, and now and again they notice it.
    Friedrich Nietzsche (1844–1900)

    The thought of you will constantly elevate my life; it will be something always above the horizon to behold, as when I look up at the evening star. I think I know your thoughts without seeing you, and as well here as in Concord. You are not at all strange to me.
    Henry David Thoreau (1817–1862)

    “Dark times” is what they call it in Norway when the sun remains below the horizon all day long: the temperature falls slowly but surely at such times.—A nice metaphor for all those thinkers for whom the sun of mankind’s future has temporarily disappeared.
    Friedrich Nietzsche (1844–1900)