Definition of St Elmo's fire in English:

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St Elmo's fire

Pronunciation: /ˈɛlməʊz/

noun

[mass noun]
A phenomenon in which a luminous electrical discharge appears on a ship or aircraft during a storm.
Example sentences
  • Another possibility is St Elmo's fire caused by a strong low level electrical field.
  • St. Elmo's Fire has long served as an omen of heavenly intervention to sailors.
  • St Elmo's fire is usually seen at the top of tall objects such as church steeples, trees or the wings of airplanes. Often a crackling sound is heard along with it.

Origin

Regarded as a sign of protection given by St Elmo, the patron saint of sailors.

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