Refers to a marriage arranged by parents for their children, often when the children are still infants or even unborn, sometimes involving a symbolic gesture or token to confirm the engagement. It specifically denotes a pre-arranged betrothal.
他们的家族世代交好，很早就指腹裁襟，为两家后代定下了婚约。
Their families had been on good terms for generations, and a betrothal was arranged for their descendants long ago, even before the children were born.
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