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  1. Oxford American Dictionary

    OR

    • IPA[ˈō ˌwär]
    • abbr
      operational research.；Oregon (in official postal use).

    • noun: OR

    • 釋義

    abbr

    • 1. operational research.
    • 2. Oregon (in official postal use).
    • 3. British other ranks (as opposed to commissioned officers).