n.

1. 黎明，拂晓[C][U]
   We must get up at dawn.

   我们必须天一亮就起来。

2. 开端；曙光，端倪[the S][（+of）]

vi.

1. 破晓，（天）刚亮
   The day was dawning.

   天渐渐亮了。

2. （时代，局面等）开始出现，渐露端倪
3. 开始（为人所）明白；顿悟[（+on/upon）]
   The truth at last dawned upon her.

   她终于明白了事情的真相。

n.

1. the first appearance of light in the sky before sunrise.
2. the beginning of something:
   the dawn of civilization.

v.

1. (of a day) begin.
   ▸come into existence.
2. (often dawn on) become evident or understood.