Dictionary

Saint Elmo's fire

noun Saint El·mo's fire \ˈsānt-ˈel-(ˌ)mōz-\

Definition of SAINT ELMO'S FIRE

:  a flaming phenomenon sometimes seen in stormy weather at prominent points on an airplane or ship and on land that is of the nature of a brush discharge of electricity —called also Saint Elmo's light

Origin of SAINT ELMO'S FIRE

St. Elmo (Erasmus) †303 Italian bishop & patron saint of sailors
First Known Use: 1753

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