ago is one of the 1000 most common headwords.
agent - ago - agree

Pronunciation

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Preposition

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Preposition
ago

  1. At an earlier time.
    I was there ten years ago.

Usage notes

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  • The intransitive preposition ago requires a complement placed before it. (Some linguists call ago a postposition but we may as well still regard it as a preposition since its complement is also its external argument.)