Meanings
nounevent horizon (plural event horizons)
plural event horizons
- astrophysicsThe gravitational sphere of a black hole within which the escape velocity is greater than the speed of light.
- astrophysicsThe furthest distance in the past of the universe from which light signals from an event can reach an observer at later times.
- broadlyfigurativelyA point of no return.
Synonyms & antonyms
Also see
Translations
Afrikaans waarnemingshorison
- waarnemingshorisongravitational sphere within which light cannot escape
Arabic أُفُق اَلْحَدَث
- أُفُق اَلْحَدَث (ʔufuq al-ḥadaṯ)gravitational sphere within which light cannot escape
Basque gertaeren muga
- gertaeren mugagravitational sphere within which light cannot escape
Bengali ঘটনা দিগন্ত
- ঘটনা দিগন্ত (ghoṭona digonto)gravitational sphere within which light cannot escape
Bulgarian хоризонт на събитията
- хоризонт на събитията (horizont na săbitijata)gravitational sphere within which light cannot escape
Catalan horitzó d'esdeveniments
- horitzó d'esdevenimentsgravitational sphere within which light cannot escape
Chinese Cantonese 事界
- 事界 (si⁶ gaai³)gravitational sphere within which light cannot escape
Chinese Mandarin 事件視界 /事件视界, 事件穹界
- 事件視界 /事件视界 (shìjiàn shìjiè)gravitational sphere within which light cannot escape
- 事件穹界 (shìjiàn qióngjiè)gravitational sphere within which light cannot escape
- 事界 (shìjiè)gravitational sphere within which light cannot escape
Czech horizont událostí
- horizont událostígravitational sphere within which light cannot escape
Danish begivenhedshorisont
- begivenhedshorisontgravitational sphere within which light cannot escape
Dutch waarnemingshorizon
- waarnemingshorizongravitational sphere within which light cannot escape
Esperanto eventa horizonto
- eventa horizontogravitational sphere within which light cannot escape
Estonian sündmuste horisont
- sündmuste horisontgravitational sphere within which light cannot escape
Finnish tapahtumahorisontti
- tapahtumahorisonttigravitational sphere within which light cannot escape
French horizon des événements
- horizon des événementsgravitational sphere within which light cannot escape
German Ereignishorizont
- Ereignishorizontgravitational sphere within which light cannot escape
Greek ορίζοντας γεγονότων
- ορίζοντας γεγονότων (orízontas gegonóton)gravitational sphere within which light cannot escape
Hebrew אופק אירועים
- אופק אירועיםgravitational sphere within which light cannot escape
Hindi घटना क्षितिज
- घटना क्षितिज (ghaṭnā kṣitij)gravitational sphere within which light cannot escape
Hungarian eseményhorizont
- eseményhorizontgravitational sphere within which light cannot escape
Icelandic sjónhvörf, skynmörk
- sjónhvörfgravitational sphere within which light cannot escape
- skynmörkgravitational sphere within which light cannot escape
Indonesian horizon peristiwa
- horizon peristiwagravitational sphere within which light cannot escape
Irish léaslíne theagmhais
- léaslíne theagmhaisgravitational sphere within which light cannot escape
Italian orizzonte degli eventi
- orizzonte degli eventigravitational sphere within which light cannot escape
Japanese 事象の地平面
- 事象の地平面 (jishō no chiheimen)gravitational sphere within which light cannot escape
Korean 사상(事象)의 지평선
- 사상(事象)의 지평선 (sasang-ui jipyeongseon)gravitational sphere within which light cannot escape
Latin horizon eventuum
- horizon eventuumgravitational sphere within which light cannot escape
Latvian notikumu horizonts
- notikumu horizontsgravitational sphere within which light cannot escape
Lithuanian įvykių horizontas
- įvykių horizontasgravitational sphere within which light cannot escape
Norwegian Bokmål hendelseshorisont
- hendelseshorisontgravitational sphere within which light cannot escape
Persian افق رویداد
- افق رویداد (ofoq-e ruydâd)gravitational sphere within which light cannot escape
Polish horyzont zdarzeń
- horyzont zdarzeńgravitational sphere within which light cannot escape
Portuguese horizonte de eventos
- horizonte de eventosgravitational sphere within which light cannot escape
Punjabi ਇਵੈਂਟ ਹੌਰਿਜ਼ਨ
- ਇਵੈਂਟ ਹੌਰਿਜ਼ਨ (ivaiṇṭ haurizan)gravitational sphere within which light cannot escape
Romanian orizontul evenimentelor, orizont de evenimente
- orizontul evenimentelorgravitational sphere within which light cannot escape
- orizont de evenimentegravitational sphere within which light cannot escape
Russian горизо́нт собы́тий, сфе́ра Шва́рцшильда
- горизо́нт собы́тий (gorizónt sobýtij)gravitational sphere within which light cannot escape
- сфе́ра Шва́рцшильда (sféra Švárcšilʹda)gravitational sphere within which light cannot escape
Slovak horizont udalostí
- horizont udalostígravitational sphere within which light cannot escape
Spanish horizonte de sucesos, horizonte de eventos
- horizonte de sucesosgravitational sphere within which light cannot escape
- horizonte de eventosgravitational sphere within which light cannot escape
Swedish händelsehorisont
- händelsehorisontgravitational sphere within which light cannot escape
Tamil நிகழ்வெல்லை
- நிகழ்வெல்லை (nikaḻvellai)gravitational sphere within which light cannot escape
Thai ขอบฟ้าเหตุการณ์
- ขอบฟ้าเหตุการณ์ (kòp-fáa-hàyt-gaan)gravitational sphere within which light cannot escape
Turkish olay ufku
- olay ufkugravitational sphere within which light cannot escape
Ukrainian горизонт подій
- горизонт подій (horyzont podij)gravitational sphere within which light cannot escape
Urdu افق وقیعہ
- افق وقیعہgravitational sphere within which light cannot escape
Vietnamese chân trời sự kiện
- chân trời sự kiệngravitational sphere within which light cannot escape
Welsh gorwel digwyddiad
- gorwel digwyddiadgravitational sphere within which light cannot escape
Cite this entry
APA
event horizon. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/event%20horizon
MLA
“event horizon.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/event%20horizon. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “event horizon,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/event%20horizon.
Source: event horizon on Wiktionary, CC BY-SA 4.0.