指腹为婚

[parental betrothal;the two (the boy and the girl) had been engaged to each other before they were born] 旧指胎儿还在母体中就由双方父母作主订婚

详细解释

见“ 指腹为亲 ”。

成语解释

双方家长将腹中胎儿结为婚姻。