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

But investors have been wagering a rebound is on the horizon for the $7 trillion equity market. Gunjan Banerji, WSJ, "China Trade Talks Triggers Bets on Rebound," 5 Nov. 2018 This new ink might not be for any of her current roles, but exciting things appear to be on the horizon for Emma. Zoë Weiner, Teen Vogue, "Emma Roberts Got a New Tiny Tattoo Over the Weekend," 15 Oct. 2018 Buy Photo Major exterior work could be on the horizon for the Academy of Music. Peter Dobrin, Philly.com, "Academy of Music board approves study for next wave of restoration," 13 July 2018 Consumers of electronics and other goods will soon see prices rise, so there is some pain on the horizon for all of us. Phillip Molnar, sandiegouniontribune.com, "Can the U.S. economy withstand a trade war?," 13 July 2018 Many fear a trade war is on the horizon for the global economy, as the United States continues to place tariffs on trading partners including the European Union, Mexico and Canada. Editors, USA TODAY, "U.S.-China trade, 'Ant Man and the Wasp,' World Cup: 5 things you need to know Friday," 6 July 2018 The sun rose behind the Heel Stone, which traditionally marks the spot on the horizon for the sunrise. James Rogers, Fox News, "Stonehenge secret: Did builders use Pythagoras' theorem 2,000 years before the philosopher lived?," 21 June 2018 USA TODAY Sports With a core built around Giannis Antetokounmpo and Khris Middleton, a new coach in Mike Budenholzer and a new arena on the horizon for next season, the Bucks are going to need to turn their No. Matt Velazquez, Milwaukee Journal Sentinel, "The NBA draft has been a mixed bag for the Bucks. They need to pull out a winner Thursday.," 20 June 2018 After a long winter when the sun doesn’t rise above the horizon for more than two months, villagers cherish fresh meat. The Economist, "Whaling in Alaska," 14 June 2018

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

19 May 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

What made you want to look up horizon? Please tell us where you read or heard it (including the quote, if possible).


to mark by some ceremony or observation

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