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 And just off to the north and to the east, beneath this layer of dark, dark sky, there is a lovely pink and orange horizon; an orange and gold color. David Montesino, Fort Worth Star-Telegram, 6 Apr. 2024 On the evening of April 10, head outside to see the two-day-old moon and bright Jupiter near each other along the western horizon just after sunset. Stephanie Vermillion, Travel + Leisure, 1 Apr. 2024 Tune Into Your Environment Expand your horizons beyond your usual workspace and find solace in the vibrant tapestry of life. Expert Panel®, Forbes, 29 Mar. 2024 Jupiter is a very bright object in the western horizon. Claire Reid, Journal Sentinel, 19 Mar. 2024 The comet can be seen in the early evenings from the Northern Hemisphere by gazing toward the west-northwest horizon. Denise Chow, NBC News, 18 Mar. 2024 Markets probably shouldn’t be pricing in anything with too much certainty at that horizon. Nicole Goodkind, CNN, 25 Mar. 2024 Shortly before sunrise, the conditions were just right to display the Belt of Venus, a phenomenon in which a swath of pastel pink runs along the opposite horizon from the sun. Maggie Downs, Los Angeles Times, 25 Mar. 2024 For his first season out of the gate, he’s demonstrated an ability to expand horizons while honoring beloved classics. Patrick Neas, Kansas City Star, 22 Mar. 2024

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 20 Apr. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!