a.

1. （目光）向下的，下垂的[Z]
   The little girl kept her eyes downcast when the headmaster talked to her.

   校长同小女孩谈话时，她一双眼睛始终低垂着。

2. 垂头丧气的，萎靡不振的
   Setbacks made him downcast.

   挫折使他沮丧。

n.[C]

1. 俯视的目光
2. 倒台，推翻
3. 【矿】下风井

adj.

1. (of eyes) looking downwards.
2. feeling despondent.

n.