nyc·​to·​pho·​bia | \ ˌnik-tə-ˈfō-bē-ə How to pronounce nyctophobia (audio) \

Definition of nyctophobia

: abnormal fear of darkness

Examples of nyctophobia in a Sentence

Recent Examples on the Web When an extreme version manifests in adulthood, it's known as nyctophobia (from nyx, the Greek word for night), a condition that has afflicted everyone from Augustus Caesar to Keanu Reeves to Muhammad Ali. Patrick Blanchfield, Esquire, "Shot in the Dark," 1 Aug. 2017

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

First Known Use of nyctophobia

1882, in the meaning defined above

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The first known use of nyctophobia was in 1882

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Cite this Entry

“Nyctophobia.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2020.

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nyc·​to·​pho·​bia | \ -ˈfō-bē-ə How to pronounce nyctophobia (audio) \

Medical Definition of nyctophobia

: abnormal fear of darkness

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