fox fire


: an eerie phosphorescent light (as of decaying wood)
also : a luminous fungus (such as Armillaria mellea) that causes decaying wood to glow

Example Sentences

Recent Examples on the Web The northern lights are referred to in Finnish as revontulet, which literally translates as fox fire. David Nikel, Forbes, 28 Mar. 2022

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

Word History

First Known Use

15th century, in the meaning defined above

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

Dictionary Entries Near fox fire

Cite this Entry

“Fox fire.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2022.

Kids Definition

fox fire


: an eerie glow seen at night in woods and bogs that is caused by a fungus in decaying wood
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