Horizon


Horizon
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]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • horizon — [ ɔrizɔ̃ ] n. m. • orizon v. 1360; orizonte XIIIe; lat. horizon, mot gr., de horizein « borner » 1 ♦ Limite circulaire de la vue, pour un observateur qui en est le centre. La plaine s étend jusqu à l horizon. Le soleil descend sur l horizon,… …   Encyclopédie Universelle

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  • horizon — HORIZON. s. m. L endroit où se termine nostre veuë, où le ciel & la terre semblent se joindre. On l appelle autrement l horizon sensible. Un horizon borné. horizon estendu. de cette colline on decouvre tout l horizon. Il signifie aussi parmi les… …   Dictionnaire de l'Académie française

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  • Horizon — (Калангут,Индия) Категория отеля: 2 звездочный отель Адрес: Porbawaddo, 403516 Калангут, Инд …   Каталог отелей

  • horizon — late 14c., orisoun, from O.Fr. orizon (14c., Mod.Fr. horizon), earlier orizonte (13c.), from L. horizontem (nom. horizon), from Gk. horizon kyklos bounding circle, from horizein bound, limit, divide, separate, from horos boundary. The h was… …   Etymology dictionary

  • horizon — [hə rī′zən] n. [altered (after L) < ME orizont < OFr orizonte < L horizon < Gr horizōn (kyklos), the bounding (circle), horizon < prp. of horizein, to bound, limit < horos, boundary, limit, akin to L urvus, city boundary, orig …   English World dictionary

  • horizon — ► NOUN 1) the line at which the earth s surface and the sky appear to meet. 2) the limit of a person s mental perception, experience, or interest. 3) Geology & Archaeology a layer or level with particular characteristics or representing a… …   English terms dictionary


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