ho·​ri·​zon | \ hə-ˈrī-zᵊn How to pronounce horizon (audio) \

Definition of horizon

1a : the line where the earth seems to meet the sky : the apparent junction of earth and sky sailing toward the horizon
b : the great circle on the celestial sphere formed by the intersection of the celestial sphere with a plane tangent to the earth's surface at an observer's position — see azimuth illustration
c : range of perception or experience broaden your horizons
d : something that might be attained opening up new horizons in the field of cancer research
2a geology : a natural soil layer deposited at a particular time usually identified by distinctive fossils
b geology : any of the reasonably distinct layers of soil or its underlying material in a vertical section of land
c anthropology : a cultural area or level of development indicated by separated groups of artifacts

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Other Words from horizon

horizonal \ hə-​ˈrī-​zᵊn-​əl How to pronounce horizonal (audio) \ adjective

Examples of horizon in a Sentence

We sailed toward the horizon. The sun rose slowly over the eastern horizon. These discoveries have opened up new horizons in the field of cancer research.
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Recent Examples on the Web

More cuts are on the horizon as the Legislature remains deadlocked, endangering services funded through the unfinished capital budget. James Brooks, Anchorage Daily News, "Standoff continues: Alaska legislators meet in two cities for fourth straight day," 11 July 2019 He’s as sharp as the reddish mountains on the horizon behind him are fuzzy, distorted by the heat shimmer. Joan Niesen, SI.com, "Bobby Witt Jr. Wins Gatorade's 2019 National Male Athlete of the Year," 10 July 2019 Related Articles Minnesota, which hasn’t won a trophy since earning the North American Soccer League spring season championship in 2014, can now see a title on the horizon. Andy Greder, Twin Cities, "U.S. Open Cup: Minnesota United won’t hold back against USL side," 9 July 2019 So as folks work their way through a certain hyped Hawkins, Indiana, show this weekend, don't worry about binging too fast and being without something new and exciting on the horizon. Ars Staff, Ars Technica, "Adieu Thrones, bye Avengers—this is the TV/film we’re eyeing for the rest of 2019," 6 July 2019 The beach is no longer caked with sticky black tar, and a yellowish tinge on the horizon is gone. Clifford Krauss, New York Times, "Israel’s Energy Dilemma: More Natural Gas Than It Can Use or Export," 5 July 2019 Parry heads into next season with a career coaching milestone on the horizon. Pomerado News, "Bob Parry respected for teaching ‘the Poway way’," 3 July 2019 And achieving that kind of strength almost always means a backlash is somewhere on the horizon. Alissa Wilkinson, Vox, "Spider-Man: Far From Home turns a class-conscious hero into a tech bro," 3 July 2019 With rain and thunderstorms on the horizon all week, outdoor festivities face the decision of how to handle the weather. Sarah Horne, Cincinnati.com, "Big plans for the 4th of July? What to expect with rain and how that impacts events," 2 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'horizon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of horizon

14th century, in the meaning defined at sense 1a

History and Etymology for horizon

Middle English orizon, from Late Latin horizont-, horizon, from Greek horizont-, horizōn, from present participle of horizein to bound, define, from horos boundary; perhaps akin to Latin urvum curved part of a plow

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Statistics for horizon

Last Updated

14 Jul 2019

Look-up Popularity

Time Traveler for horizon

The first known use of horizon was in the 14th century

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More Definitions for horizon



English Language Learners Definition of horizon

: the line where the earth or sea seems to meet the sky
: the limit or range of a person's knowledge, understanding, or experience
: the limit of what is possible in a particular field or activity


ho·​ri·​zon | \ hə-ˈrī-zᵊn How to pronounce horizon (audio) \

Kids Definition of horizon

1 : the line where the earth or sea seems to meet the sky
2 : the limit of a person's outlook or experience Reading broadens our horizons.

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Comments on horizon

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