ad.

1. 头向前地
   He plunged headlong into the river.

   他一头钻进河里。

   The boy fell headlong.

   那男孩摔了个倒栽葱。

2. 猛然地
   A young man rushed headlong into the crowd.

   一个年轻人急匆匆用力挤进人群。

3. 鲁莽地；轻率地
   One should not rush headlong into buying stocks.

   不应轻率购买股票。

a.[Z]

1. 头朝前的
   He made a headlong plunge into the river.

   他一头栽进河里。

2. 猛然的
   They made a headlong dash for the door.

   他们迅猛地向门口冲去。

3. 鲁莽的；轻率的；（感情）奔放的
   The headlong leader is forever making headlong decisions.

   那个鲁莽的领导人老是作轻率的决定。

adv.

adj.

1. with the head foremost.
2. in a rush; with reckless haste.