grey/gray
early

greet
He always got up to greet the dawn.

see, watch

break, come, come up
Dawn was breaking over the valley.

light, sky
chorus
The dawn chorus (= birds singing) woke Robyn at five.

patrol, raid
Ammunition was seized during a dawn raid on the house.

at dawn
That morning, she rose at dawn.

before dawn
by dawn
till dawn, until dawn
towards/toward dawn

(at) the crack of dawn (= as soon as it begins to be light), from dawn to dusk
He works from dawn to dusk, and often well into the night.

false
This sudden success may prove to be a false dawn (= not the beginning of continued success).

new

mark, signal
This appointment marked the dawn of a productive era in her scientific career.

see
We are seeing the dawn of a new era.

dawn of
the dawn of civilization/history
Let's think back to the dawn of time.

dawn bright, clear, cold, sunny, etc.
The day dawned bright and sunny.

suddenly
gradually, slowly
It slowly dawned on me that he might have been mistaken.

eventually, finally

begin to
It was beginning to dawn on her that she had been fooled.

on
The dreadful truth finally dawned on me.

Dawn is used with these nouns as the subject:
century, day, morning, realization, recognition