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Definition of horizon

horizon

/həˈɹaɪ.zən/
ho · ri · zon

Adverb:horizontally
•
Plural:horizons
•
Adjective:horizontal
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horizon Lexical Profile

horizon Game Scores & Validity

• noun

1

The apparent line at which the earth's surface and the sky appear to meet.

Example

"We watched the orange sun dip slowly below the ocean horizon."


2

The limit or range of a person's mental perception, experience, interest, or knowledge (often used in the plural).

Example

"Studying abroad for a semester helped broaden her cultural horizons."


3

A distinct layer of soil or rock having characteristic physical or chemical properties, or a specific level in an archaeological site.

Example

"Geologists examined the dark topsoil horizon to determine the history of vegetation in the valley."

Synonyms
View all synonyms for horizon

• Rhymes for horizon

Word Origin & Etymology

Borrowed from Old French orizon, via Latin horizon, from the Ancient Greek phrase horizōn kyklos ('bounding circle'), derived from horos ('boundary' or 'limit').

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Horizon. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/horizon
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