a.

1. 暗；黑暗的
   It's getting dark.

   天快黑了。

2. （颜色）深的；（皮肤等）微黑的
   There are dark clouds in the sky.

   天空乌云密布。

3. 阴暗的，阴郁的
   The prospects look dark.

   前景黯淡。

4. 邪恶的，坏的
   There's a dark side to Jay's character.

   杰伊的性格中有阴险的一面。

5. 隐藏的，隐秘的；暧昧的
6. 无知的，蒙昧的

n.

1. 黑暗，暗处[the S]
   She could see nothing in the dark.

   她在黑暗中什么也看不见。

2. 黑夜；黄昏，傍晚[U]
3. 无知[the S]
   The public was kept in the dark about the deal.

   关于这场交易公众被蒙在鼓里。

4. 模糊；暧昧；隐晦[U]

adj.

1. with little or no light.
2. of a deep or sombre colour.
   ▸(of skin, hair, or eyes) brown or black.
   ▸(of a person) having dark skin, hair, or eyes.
3. characterized by unhappiness or unpleasantness:
   the dark days of the war.
   ▸(of an expression) angry.
   ▸evil; sinister:

   dark deeds.
4. mysterious:
   a dark secret.
   ▸ (darkest) humorous (of a region) most remote, inaccessible, or uncivilized.
   ▸archaic ignorant.

n.

1. (the dark) the absence of light.
   ▸a dark colour or shade.
2. nightfall.