n. [ Gr. &unr_; running before; &unr_; before + &unr_; to run: cf. F. prodrome. ] 1. A forerunner; a precursor. [ 1913 Webster ]
2. (Med.) A premonitory symptom; a symptom or sensation experienced by a person which presages the onset of a disease or abnormal physiological event; as, the prodrome of an epileptic seizure. [ PJC ]