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[C or U] (the study of or a record of) past events considered together, especially events of a particular period, country or subjectI studied modern European history at college.
American history
Annie's decided to write a history of electronic music.
I only asked him for a cigarette, but two hours later he'd told me his whole life history.
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[U] informal something that happened or ended a long time ago and is not important now, or a person who is not important now, although they were in the pastLast year's report is ancient history and totally irrelevant to the current situation.
"What about Dan - are you still seeing him?" "Oh, he's history."