n.

1. 逃跑，逃亡；私奔[U]
   The lovers' runaway caused their parents much pain.

   这对情侣的私奔给他们的父母带来了很多痛苦。

2. （马的）脱缰奔逃
3. 逃跑者，逃亡者；脱缰奔逃的牲口[C]
   They failed to find any trace of the runaways.

   他们未能找到逃跑者的任何踪迹。

4. 遥遥领先的赛跑；巨大的胜利

a.[B]

1. 逃跑的，逃亡的；私奔的
   The parents were worried about their runaway child.

   那对父母对他们出走的孩子非常担忧。

2. （马等）脱缰奔逃的；控制不住的；发展迅猛的；（物价）飞涨的
   The runaway inflation hit every family.

   无法控制的通货膨胀殃及每个家庭。

   At last he stopped the runaway horse.

   他终于停住了这匹脱缰之马。

3. 遥遥领先的；轻易取得的；巨大的
   His second book turned out to be a runaway best-seller.

   他的第二本书成了抢手的畅销书。

n.

1. a person who has run away from their home or an institution.
2. [as modifier] (of an animal or vehicle) running out of control.
   ▸happening or done quickly or uncontrollably:

   runaway success.