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3 definitions found
 for Visible horizon
From The Collaborative International Dictionary of English v.0.48 :

  Horizon \Ho*ri"zon\, n. [F., fr. L. horizon, fr. Gr. ? (sc. ?)
     the bounding line, horizon, fr. ? to bound, fr. ? boundary,
     limit.]
     1. The line which bounds that part of the earth's surface
        visible to a spectator from a given point; the apparent
        junction of the earth and sky.
        [1913 Webster]
  
              And when the morning sun shall raise his car
              Above the border of this horizon.     --Shak.
        [1913 Webster]
  
              All the horizon round
              Invested with bright rays.            --Milton.
        [1913 Webster]
  
     2. (Astron.)
        (a) A plane passing through the eye of the spectator and
            at right angles to the vertical at a given place; a
            plane tangent to the earth's surface at that place;
            called distinctively the sensible horizon.
        (b) A plane parallel to the sensible horizon of a place,
            and passing through the earth's center; -- called also
            rational horizon or celestial horizon.
        (c) (Naut.) The unbroken line separating sky and water, as
            seen by an eye at a given elevation, no land being
            visible.
            [1913 Webster]
  
     3. (Geol.) The epoch or time during which a deposit was made.
        [1913 Webster]
  
              The strata all over the earth, which were formed at
              the same time, are said to belong to the same
              geological horizon.                   --Le Conte.
        [1913 Webster]
  
     4. (Painting) The chief horizontal line in a picture of any
        sort, which determines in the picture the height of the
        eye of the spectator; in an extended landscape, the
        representation of the natural horizon corresponds with
        this line.
        [1913 Webster]
  
     5. The limit of a person's range of perception, capabilities,
        or experience; as, children raised in the inner city have
        limited horizons.
        [PJC]
  
     6. [fig.] A boundary point or line, or a time point, beyond
        which new knowledge or experiences may be found; as, more
        powerful computers are just over the horizon.
        [PJC]
  
     Apparent horizon. See under Apparent.
  
     Artificial horizon, a level mirror, as the surface of
        mercury in a shallow vessel, or a plane reflector adjusted
        to the true level artificially; -- used chiefly with the
        sextant for observing the double altitude of a celestial
        body.
  
     Celestial horizon. (Astron.) See def. 2, above.
  
     Dip of the horizon (Astron.), the vertical angle between
        the sensible horizon and a line to the visible horizon,
        the latter always being below the former.
  
     Rational horizon, and Sensible horizon. (Astron.) See
        def. 2, above.
  
     Visible horizon. See definitions 1 and 2, above.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Visible \Vis"i*ble\, a. [L. visibilis, fr. videre, visum, to
     see: cf. F. visible. See Vision.]
     1. Perceivable by the eye; capable of being seen;
        perceptible; in view; as, a visible star; the least spot
        is visible on white paper.
        [1913 Webster]
  
              Maker of heaven and earth, and of all things visible
              and invisible.                        --Bk. of Com.
                                                    Prayer.
        [1913 Webster]
  
              Virtue made visible in outward grace. --Young.
        [1913 Webster]
  
     2. Noticeable; apparent; open; conspicuous. --Shak.
        [1913 Webster]
  
              The factions at court were greater, or more visible,
              than before.                          --Clarendon.
        [1913 Webster]
  
     Visible church (Theol.), the apparent church of Christ on
        earth; the whole body of professed believers in Christ, as
        contradistinguished from the invisible, or real, church,
        consisting of sanctified persons.
  
     Visible horizon. Same as Apparent horizon, under
        Apparent.
        [1913 Webster] -- Vis"i*ble*ness, n. -- Vis"i*bly,
        adv.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  visible horizon
      n 1: the line at which the sky and Earth appear to meet [syn:
           horizon, apparent horizon, visible horizon, sensible
           horizon, skyline]

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