premonitor noun 2verb 1forms 3 noun2 •One who, or that which, gives premonition; a harbingerBeloved, give me leave to be a premonitor, a forewarner to you in this place, and to tell you that these things must needs provoke God to heavy displeasure . — 1642 •A forerunner; a predecessor.And within this erect sport-producing structure is found a columella, which may be regarded as the premonitor of a vascular system. — 1905 verb1 •To monitor beforehand.The premonitoring group recorded food, amount, time, and place of eating prior to eating. — 1984 formspremonitored · premonitoring · premonitors