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

Sensible \Sen"si*ble\, a. [F., fr. L. sensibilis, fr. sensus
   sense.]
   1. Capable of being perceived by the senses; apprehensible
      through the bodily organs; hence, also, perceptible to the
      mind; making an impression upon the sense, reason, or
      understanding; ?????? heat; sensible resistance.
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            Air is sensible to the touch by its motion.
                                                  --Arbuthnot.
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            The disgrace was more sensible than the pain. --Sir
                                                  W. Temple.
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            Any very sensible effect upon the prices of things.
                                                  --A. Smith.
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   2. Having the capacity of receiving impressions from external
      objects; capable of perceiving by the instrumentality of
      the proper organs; liable to be affected physsically or
      mentally; impressible.
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            Would your cambric were sensible as your finger.
                                                  --Shak.
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   3. Hence: Liable to impression from without; easily affected;
      having nice perception or acute feeling; sensitive; also,
      readily moved or affected by natural agents; delicate; as,
      a sensible thermometer. "With affection wondrous
      sensible." --Shak.
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   4. Perceiving or having perception, either by the senses or
      the mind; cognizant; perceiving so clearly as to be
      convinced; satisfied; persuaded.
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            He [man] can not think at any time, waking or
            sleeping, without being sensible of it. --Locke.
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            They are now sensible it would have been better to
            comply than to refuse.                --Addison.
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   5. Having moral perception; capable of being affected by
      moral good or evil.
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   6. Possessing or containing sense or reason; giftedwith, or
      characterized by, good or common sense; intelligent; wise.
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            Now a sensible man, by and by a fool. --Shak.
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   Sensible note or Sensible tone (Mus.), the major seventh
      note of any scale; -- so called because, being but a half
      step below the octave, or key tone, and naturally leading
      up to that, it makes the ear sensible of its approaching
      sound. Called also the leading tone.

   Sensible horizon. See Horizon, n., 2.
      (a) .
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   Syn: Intelligent; wise.

   Usage: Sensible, Intelligent. We call a man sensible
          whose judgments and conduct are marked and governed by
          sound judgment or good common sense. We call one
          intelligent who is quick and clear in his
          understanding, i. e., who discriminates readily and
          nicely in respect to difficult and important
          distinction. The sphere of the sensible man lies in
          matters of practical concern; of the intelligent man,
          in subjects of intellectual interest. "I have been
          tired with accounts from sensible men, furnished with
          matters of fact which have happened within their own
          knowledge." --Addison. "Trace out numerous footsteps .
          . . of a most wise and intelligent architect
          throughout all this stupendous fabric." --Woodward.
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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.
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            And when the morning sun shall raise his car
            Above the border of this horizon.     --Shak.
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            All the horizon round
            Invested with bright rays.            --Milton.
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   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.
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   3. (Geol.) The epoch or time during which a deposit was made.
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            The strata all over the earth, which were formed at
            the same time, are said to belong to the same
            geological horizon.                   --Le Conte.
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   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.
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   5. The limit of a person's range of perception, capabilities,
      or experience; as, children raised in the inner city have
      limited horizons.
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   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.
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   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.
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