/ hɪˈstɔːriən; NAmE / noun
a person who studies or writes about history; an expert in history
HELP NOTE : Some speakers do not pronounce the 'h' at the beginning of historian and use 'an' instead of 'a' before it. This now sounds old-fashioned.
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WORD ORIGIN
late Middle English : from Old French historien , via Latin from Greek historia finding out, narrative, history, from histōr learned, wise man, from an Indo-European root shared by wit have knowledge .