Definition of "historian"

historian

/hɪˈstɔːɹɪən/

noun
plural historians
1. A writer of history; a chronicler; an annalist.
2. One who studies or researches history.
3. (medicine) One who recounts their own medical history.
  Quotations
  The patient is unconscious when the syncopal event takes place and therefore is a poor historian.
  2007, Joyce E. Dains, Linda Ciofu Baumann, Pamela Scheibel, Advanced Health Assessment and Clinical Diagnosis in Primary Care