What does horizon mean?

Definitions for horizon
həˈraɪ zənhori·zon

This dictionary definitions page includes all the possible meanings, example usage and translations of the word horizon.

Princeton's WordNet

  1. horizon, apparent horizon, visible horizon, sensible horizon, skylinenoun

    the line at which the sky and Earth appear to meet

  2. horizon, view, purviewnoun

    the range of interest or activity that can be anticipated

    "It is beyond the horizon of present knowledge"

  3. horizonnoun

    a specific layer or stratum of soil or subsoil in a vertical cross section of land

  4. horizon, celestial horizonnoun

    the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth


  1. Horizonnoun

    The limit of a person's range of perception, capabilities, or experience; as, children raised in the inner city have limited horizons.


  1. horizonnoun

    The horizontal line that appears to separate the Earth from the sky.

  2. horizonnoun

    The range or limit of one's knowledge, experience or interest.

  3. horizonnoun

    A specific layer of soil or strata

  4. horizonnoun

    A cultural sub-period or level within a more encompassing time period.

  5. Etymology: From ὁρίζων, from ὅρος

Samuel Johnson's Dictionary

  1. HORIZONnoun

    The line that terminates the view. The horizon is distinguished into sensible and real: the sensible horizon is the circular line which limits the view; the real is that which would bound it, if it could take in the hemisphere. It is falsely pronounced by William Shakespeare hórizon.

    Etymology: ὁϱίζων.

    When the morning sun shall raise his car
    Above the border of this horizon,
    We’ll forward towards Warwick and his mates. William Shakespeare.

    She began to cast with herself from what coast this blazing star should first appear, and at what time it must be upon the horizon of Ireland. Francis Bacon, Henry VII.

    Far in th’ horizon to the North appear’d,
    From skirt to skirt, a fiery region. John Milton, Paradise Lost.

    In his East the glorious lamp was seen,
    Regent of day; and all th’ horizon round
    Invested with bright rays. John Milton, Paradise Lost, b. vii.

    The morning lark, the messenger of day,
    Saluted in her song the morning gray;
    And soon the sun arose with beams so bright,
    That all th’ horizon laugh’d to see the joyous sight. Dryden.

    When the sea is worked up in a tempest, so that the horizon on every side is nothing but foaming billows and floating mountains, it is impossible to describe the agreeable horrour that rises from such a prospect. Joseph Addison, Spectator.


  1. Horizon

    The horizon is the apparent curve that separates the surface of a celestial body from its sky when viewed from the perspective of an observer on or near the surface of the relevant body. This curve divides all viewing directions based on whether it intersects the relevant body's surface or not. The true horizon is a theoretical line, which can only be observed to any degree of accuracy when it lies along a relatively smooth surface such as that of Earth's oceans. At many locations, this line is obscured by terrain, and on Earth it can also be obscured by life forms such as trees and/or human constructs such as buildings. The resulting intersection of such obstructions with the sky is called the visible horizon. On Earth, when looking at a sea from a shore, the part of the sea closest to the horizon is called the offing.The true horizon surrounds the observer and it is typically assumed to be a circle, drawn on the surface of a perfectly spherical model of the relevant celestial body, i.e., a small circle of the local osculating sphere. With respect to Earth, the center of the true horizon is below the observer and below sea level. Its radius or horizontal distance from the observer varies slightly from day to day due to atmospheric refraction, which is greatly affected by weather conditions. Also, the higher the observer's eyes are from sea level, the farther away the horizon is from the observer. For instance, in standard atmospheric conditions, for an observer with eye level above sea level by 1.70 metres (5 ft 7 in), the horizon is at a distance of about 5 kilometres (3.1 mi). When observed from very high standpoints, such as a space station, the horizon is much farther away and it encompasses a much larger area of Earth's surface. In this case, the horizon would no longer be a perfect circle, not even a plane curve such as an ellipse, especially when the observer is above the equator, as the Earth's surface can be better modeled as an oblate ellipsoid than as a sphere.


  1. horizon

    Horizon usually refers to the imaginary line that separates the Earth's surface from the sky, or the apparent intersection of the Earth and sky when viewed from a specific point. It is the farthest distance an observer can see before the Earth curves out of sight.

Webster Dictionary

  1. Horizonnoun

    the circle 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

  2. Horizonnoun

    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

  3. Horizonnoun

    a plane parallel to the sensible horizon of a place, and passing through the earth's center; -- called also rational / celestial horizon

  4. Horizonnoun

    the unbroken line separating sky and water, as seen by an eye at a given elevation, no land being visible

  5. Horizonnoun

    the epoch or time during which a deposit was made

  6. Horizonnoun

    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

  7. Etymology: [F., fr. L. horizon, fr. Gr. (sc. ) the bounding line, horizon, fr. to bound, fr. boundary, limit.]


  1. Horizon

    The horizon 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", "boundary, landmark".

Chambers 20th Century Dictionary

  1. Horizon

    ho-rī′zun, n. the circular line formed by the apparent meeting of the earth and sky—in astronomical phrase, the sensible, apparent, or visible horizon, as opposed to the astronomical, true, or rational horizon, the circle formed by a plane passing through the centre of the earth, parallel to the sensible horizon, and produced to meet the heavens: (geol.) a stratum marked by the presence of a particular fossil not found in the overlying or underlying beds: any level line or surface: the limit of one's experience or apprehension.—adj. Horizon′tal, pertaining to the horizon: parallel to the horizon: level: near the horizon: measured in a plane of the horizon.—n. Horizontal′ity.—adv. Horizon′tally.—Artificial horizon, a small trough containing quicksilver, the surface of which affords a reflection of the celestial bodies. [Fr.,—L.,—Gr. horizōn (kyklos), bounding (circle), horizein, to bound—horos, a limit.]

Dictionary of Nautical Terms

  1. horizon

    The apparent or visible circle which bounds our vision at sea; it is that line which is described by the sky and water appearing to meet. This is designated as the sensible horizon; the rational, or true one, being a great circle of the heavens, parallel to the sensible horizon, but passing through the centre of the earth.

Military Dictionary and Gazetteer

  1. horizon

    (Gr. orizo, I bound or terminate). In astronomy and geography, is the plane of the great circle of the sphere, dividing the visible from the invisible hemisphere. The horizon is either sensible or rational. The sensible horizon is a plane which is a tangent to the earth’s surface at the place of the spectator, extended on all sides till it is bounded by the sky; the rational horizon is a plane parallel to the former, but passing through the centre of the earth. Both the sensible and rational horizon are relative terms, and change with every change of the spectator’s position on the surface of the earth; in all cases they are perpendicular to the direction of gravity.

Editors Contribution

  1. Horizon

    The line at which the sky and Earth appear to meet.

    The horizon is a beautiful sight when looking out to sea.

    Submitted by MaryC on March 12, 2020  

Suggested Resources

  1. horizon

    Song lyrics by horizon -- Explore a large variety of song lyrics performed by horizon on the Lyrics.com website.

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'horizon' in Nouns Frequency: #1999

How to pronounce horizon?

How to say horizon in sign language?


  1. Chaldean Numerology

    The numerical value of horizon in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of horizon in Pythagorean Numerology is: 6

Examples of horizon in a Sentence

  1. Warren Bennis:

    Leaders keep their eyes on the horizon, not just on the bottom line.

  2. Christian Tom:

    Animal Crossing : New Horizon is a dynamic, diverse, and powerful platform that brings communities together from across the world, animal Crossing : New Horizon is an exciting new opportunity for our campaign to engage and connect Joe Biden supporters as they build and decorate their islands.

  3. Brian Pacheco:

    What I appreciate in Ryder’s response is that Winona Ryder states Winona Ryder is speaking from Winona Ryder own experience. I don’t know what happened in Johnny Depp’s relationships with Winona Ryder and Amber Heard, but I can speak to our experiences at Safe Horizon, and Safe Horizon’s absolutely possible that an abuser did not have a known history of abuse or did not abuse a past partner, but then went on to become abusive to a different spouse. What is really important to remember is that we don’t discredit someone’s allegations of abuse just because a former partner said ‘ that did n’t happen to me. ’ Safe Horizon’s within the realm of possibilities that both individuals are telling the truth.

  4. Dale Carnegie:

    One of the most tragic things I know about human nature is that all of us tend to put off living. We are all dreaming of some magical rose garden over the horizon-instead of enjoying the roses blooming outside our windows today.

  5. Ethel Barrymore:

    You must learn day by day, year by year to broaden your horizon. The more things you love, the more you are interested in, the more you enjoy, the more you are indignant about, the more you have left when anything happens.

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Translations for horizon

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"horizon." Definitions.net. STANDS4 LLC, 2023. Web. 24 Sep. 2023. <https://www.definitions.net/definition/horizon>.

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    someone who takes the place of another person
    • A. noninvasive
    • B. alternate
    • C. reassuring
    • D. aligned

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