We found 18 dictionaries that define the word St Elmo's fire:

General (11 matching dictionaries)

1. St. Elmo's fire: Merriam-Webster
2. St. Elmo's fire: Oxford Learner's Dictionaries
3. St. Elmo's fire: Vocabulary.com
4. St. Elmo's fire: Wordnik
5. St. Elmo's fire: Wiktionary
6. st. elmo's fire, st. elmos fire, st elmo's fire, st elmos fire: Dictionary.com
7. St. Elmo's Fire, St. Elmo's Fire (Man in Motion), St. Elmo's Fire (disambiguation), St. Elmo's Fire (film), St. Elmos Fire, St Elmo's Fire, St Elmos Fire, St. Elmo's fire, St Elmo's fire: Wikipedia, the Free Encyclopedia
8. St. elmo's fire: Rhymezone
9. st. elmos fire: FreeDictionary.org
10. st. elmo's fire: Mnemonic Dictionary
11. St. Elmo's fire: TheFreeDictionary.com

Computing (1 matching dictionary)

12. St. Elmos Fire, St Elmos Fire, St. Elmo's fire, St Elmo's fire: Encyclopedia

Miscellaneous (1 matching dictionary)

13. St. Elmo's fire: Wordcraft Dictionary

Science (1 matching dictionary)

14. Weather Glossary (No longer online)

Slang (1 matching dictionary)

15. St. Elmo's Fire: Urban Dictionary

Tech (3 matching dictionaries)

16. Glossary of Meteorology (No longer online)
17. National Weather Service Glossary (No longer online)
18. St. Elmo's Fire: Latitude Mexico

Definitions from Wiktionary (St Elmo's fire) ▸ noun:  Alternative spelling of St. Elmo's fire [An electrical discharge, or corona, seen around pointed objects, caused by ionization of the atmosphere during storms.] ▸ Words similar to St Elmo's fire ▸ Usage examples for St Elmo's fire ▸ Idioms related to St Elmo's fire ▸ Wikipedia articles (New!) ▸ Words that often appear near St Elmo's fire ▸ Rhymes of St Elmo's fire ▸ Invented words related to St Elmo's fire