horizon

noun ho·ri·zon \ hə-ˈrī-zᵊn \

Definition of horizon

1 a :the line where the earth seems to meet the sky :the apparent junction of earth and sky
  • sailing toward the horizon
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
  • broaden your horizons
d :something that might be attained
  • opening up new horizons in the field of cancer research
2 a geology :a natural soil layer deposited at a particular time usually identified by distinctive fossils
b geology :any of the reasonably distinct layers of soil or its underlying material in a vertical section of land
c anthropology :a cultural area or level of development indicated by separated groups of artifacts

horizonal

play \hə-ˈrī-zᵊn-əl\ adjective

Examples of horizon in a Sentence

  1. We sailed toward the horizon.

  2. The sun rose slowly over the eastern horizon.

  3. These discoveries have opened up new horizons in the field of cancer research.

Recent Examples of horizon from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'horizon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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

Other Archaeology Terms



HORIZON Defined for English Language Learners

horizon

noun

Definition of horizon for English Language Learners

  • 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


HORIZON Defined for Kids

horizon

noun ho·ri·zon \ hə-ˈrī-zᵊn \

Definition of horizon for Students

1 :the line where the earth or sea seems to meet the sky
2 :the limit of a person's outlook or experience
  • Reading broadens our horizons.


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