ancient history

American  

noun

1. the study or a course of study of history before the end of the Western Roman Empire a.d. 476.

2. information or an event of the recent past that is common knowledge or is no longer pertinent.

   Last week's news is ancient history.

3. an event, as in a person's life, that occurred in the remote past and has no practical relationship with the present.

   She was my best friend in high school, but that's ancient history now.

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ancient history British  

noun

1. the history of the ancient world from the earliest known civilizations to the collapse of the Western Roman Empire in 476 _a.d

2. informal a recent event or fact sufficiently familiar to have lost its pertinence

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ancient history Idioms  

1. A past event, as in She's talking about her sea voyage, but that's ancient history, or And then there was his divorce, but you don't want to hear ancient history. This hyperbolic idiom transfers the field of ancient history to a much-repeated tale.

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Etymology

Origin of ancient history

First recorded in 1585–95

Example Sentences

That isn’t ancient history either: Between 2000 and 2021, the S&P 600’s total return was more than twice that of the S&P 500.

From The Wall Street Journal • Jan. 26, 2026

Bostock felt like ancient history on Tuesday morning, when the court heard oral argument in Little v.

From Slate • Jan. 14, 2026

World War One seemed like ancient history in my childhood imagination, even though I was born only 40 years after the signing of the Treaty of Versailles.

From BBC • Nov. 10, 2025

The implications of these findings extend far beyond understanding ancient history.

From Science Daily • Nov. 2, 2025

In the evenings, when I sang this song with the Lansman family, those words seemed like ancient history.

From "The Boy on the Wooden Box" by Leon Leyson