nyc·​to·​pho·​bia ˌnik-tə-ˈfō-bē-ə How to pronounce nyctophobia (audio)
: 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, 1 Aug. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nyctophobia.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of nyctophobia was in 1882

Dictionary Entries Near nyctophobia

Cite this Entry

“Nyctophobia.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2023.

Medical Definition


nyc·​to·​pho·​bia -ˈfō-bē-ə How to pronounce nyctophobia (audio)
: abnormal fear of darkness
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