Saint Elmo's Fire 1 : A visible electric discharge from charged, often pointed, objects such as the tips of masts or trees; it is seen sometimes during electrical storms
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}