saint elmo's fire

NOUN
17 LETTERS · 2 SYLLABLES · STARTS WITH S

saint elmo's fire is a valid 17-letter word worth 19 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1A1I1N1T1E1L1M3O1'0S1F4I1R1E1
1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 + 1 + 0 + 1 + 0 + 4 + 1 + 1 + 1 =19 PTS
DOUBLE WORD → 38TRIPLE WORD → 57
MEANING

What does saint elmo's fire mean?

NOUN · 1 SENSE