horizon

play

noun ho·ri·zon \hə-ˈrī-z^ən\

Simple Definition of horizon

the 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

Source: Merriam-Webster's Learner's Dictionary

Full Definition of horizon

1 a : the apparent junction of earth and sky 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 d : something that might be attained <new horizons>
2 a : the geological deposit of a particular time usually identified by distinctive fossils b : any of the reasonably distinct layers of soil or its underlying material in a vertical section of land c : a cultural area or level of development indicated by separated groups of artifacts

horizonal

play \-ˈrī-z^ən-əl\ adjective

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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.

Origin and Etymology of 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

First Known Use: 14th century