Horizon Definition

hə-rīzən
horizons
noun
horizons
The distant line where the sky appears to meet the surface of the earth.
Webster's New World
The limit or edge of the observable universe.
American Heritage
A similar line observed from the surface of the moon, etc.
Webster's New World
The limit or extent of one's outlook, experience, interest, knowledge, etc.
Travel broadens one's horizons.
Webster's New World
A specific position in a column of rock layers, usually designated by the occurrence of one or more distinctive fossils or by a distinctive sediment bed, that is used in stratigraphy.
American Heritage
Synonyms:
idiom
on the horizon
  • in the foreseeable future; impending, looming, destined, etc.
Webster's New World

Other Word Forms of Horizon

Noun

Singular:
horizon
Plural:
horizons

Idioms, Phrasal Verbs Related to Horizon

Origin of Horizon

  • Middle English orizon from Old French from Latin horizōn from Greek horizōn (kuklos) limiting (circle), horizon present participle of horizein to limit from horos boundary

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Old French orizon, via Latin, from Ancient Greek ὁρίζων (horizōn), from ὅρος (horos, “boundary”)

    From Wiktionary

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