occultation

noun

oc·​cul·​ta·​tion ˌä-(ˌ)kəl-ˈtā-shən How to pronounce occultation (audio)
1
: the state of being hidden from view or lost to notice
2
: the interruption of the light from a celestial body or of the signals from a spacecraft by the intervention of a celestial body
especially : an eclipse of a star or planet by the moon

Examples of occultation in a Sentence

Recent Examples on the Web
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To reach the new conclusions, a team of researchers analyzed Juno's radio occultation data, which essentially allows the spacecraft to peer through Jupiter's dense clouds in order to understand the planet's internal structure. Eric Lagatta, USA Today, 5 Feb. 2026 Lunar coverups like this are called occultations. Mike Lynch, Twin Cities, 1 Feb. 2026 For some lucky stargazers, the spectacle continues on Feb. 2, when the moon briefly passes in front of Regulus in a rare occultation. Valerie Mesa, PEOPLE, 26 Jan. 2026 The occultation will last less than an hour, after which Regulus will reappear on the other side of the moon. Phil Plait, Scientific American, 8 Jan. 2026 See All Example Sentences for occultation

Word History

Etymology

Middle English occultacion, borrowed from Latin occultātiōn-, occultātiō "concealment, interruption of light from a celestial body," from occultāre "to prevent from being seen, conceal, keep secret" + -tiōn- -tiō, suffix of verbal action — more at occult entry 1

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of occultation was in the 15th century

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Cite this Entry

“Occultation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/occultation. Accessed 15 Feb. 2026.

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