What does apparent horizon mean?

Definitions for apparent horizon
ap·par·ent hori·zon

Here are all the possible meanings and translations of the word apparent horizon.

Princeton's WordNet

  1. horizon, apparent horizon, visible horizon, sensible horizon, skyline(noun)

    the line at which the sky and Earth appear to meet


  1. Apparent horizon

    In general relativity, an apparent horizon is a surface that is the boundary between light rays that are directed outwards and moving outwards, and those directed outwards but moving inwards. Apparent horizons are not invariant properties of a spacetime. They are observer-dependent, and in particular they are distinct from absolute horizons. See, however, the articles on ergosphere, Cauchy horizon, the Reissner-Nordström solution, photon sphere, Killing horizon and naked singularity; the notion of a horizon in general relativity is subtle, and depends on fine distinctions.

Dictionary of Military and Associated Terms

  1. apparent horizon

    The visible line of demarcation between land/sea and sky.

Dictionary of Nautical Terms

  1. apparent horizon

    See HORIZON.

How to pronounce apparent horizon?

  1. Alex
    US English

How to say apparent horizon in sign language?

  1. apparenthorizon


  1. Chaldean Numerology

    The numerical value of apparent horizon in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of apparent horizon in Pythagorean Numerology is: 7

Images & Illustrations of apparent horizon

  1. apparent horizon


Find a translation for the apparent horizon definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Український (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Discuss these apparent horizon definitions with the community:

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:


Use the citation below to add this definition to your bibliography:


"apparent horizon." Definitions.net. STANDS4 LLC, 2020. Web. 3 Jun 2020. <https://www.definitions.net/definition/apparent+horizon>.

Are we missing a good definition for apparent horizon? Don't keep it to yourself...

Free, no signup required:

Add to Chrome

Get instant definitions for any word that hits you anywhere on the web!

Free, no signup required:

Add to Firefox

Get instant definitions for any word that hits you anywhere on the web!

Nearby & related entries:

Alternative searches for apparent horizon:

Thanks for your vote! We truly appreciate your support.