Definition of "Dawn" :

noun: the earliest period

"The dawn of civilization."

noun: the first light of day

"We got up before dawn."

noun: an opening time period

"It was the dawn of the Roman Empire."

verb: become light

"It started to dawn, and we had to get up."

verb: become clear or enter one's consciousness or emotions

"It dawned on him that she had betrayed him."

verb: appear or develop

"The age of computers had dawned."