- occurring suddenly and with great intensity or severity
- Pathology. developing or progressing suddenly
c.1600, from Fr. fulminant or directly from L. fulminantem, prp. of fulminare (see fulminate). (http://dictionary.reference.com/browse/fulminant)
"Jenny, Goldstein realized, 'has leukemia and is currently in the hospital because she developed jaundice. Her eyeballs are still yellow'—presaging fulminant liver failure."
- Siddhartha Mukherjee, The Emperor of All Maladies: A Biography of Cancer