ho·​ri·​zon hə-ˈrī-zᵊn How to pronounce horizon (audio)
: the line where the earth seems to meet the sky : the apparent junction of earth and sky
sailing toward the horizon
: 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
: range of perception or experience
broaden your horizons
: something that might be attained
opening up new horizons in the field of cancer research
geology : a natural soil layer deposited at a particular time usually identified by distinctive fossils
geology : any of the reasonably distinct layers of soil or its underlying material in a vertical section of land
anthropology : a cultural area or level of development indicated by separated groups of artifacts
horizonal 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.
Recent Examples on the Web Inflation expectations over a 1-year horizon also rose to 3.5%, from 3.2%, showing rising consumer prices—and the rate hikes that might follow—are a concern on Main Street. Will Daniel, Fortune, 13 May 2024 Look for the horizon: The northern horizon, that is. Drake Bentley, Journal Sentinel, 12 May 2024 See all Example Sentences for horizon 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'horizon.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

First Known Use

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

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

Dictionary Entries Near horizon

Cite this Entry

“Horizon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/horizon. Accessed 27 May. 2024.

Kids Definition


ho·​ri·​zon ˈhə-ˈrīz-ᵊn How to pronounce horizon (audio)
: the line where the earth or sea seems to meet the sky
: the limit or range of a person's outlook or experience
reading broadens our horizons
: a distinct layer of soil or its underlying material in a vertical section of land
-ˈrīz-nəl How to pronounce horizon (audio)
Last Updated: - Updated example sentences
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