dawn in WordNet English dictionary

1. the first light of day
   "we got up before dawn"; "they talked until morning"
   dawn  dawning  morning  aurora  first light  daybreak  break of day  break of the day  dayspring  sunrise  sunup  cockcrow 
   
2. the earliest period
   "the dawn of civilization"; "the morning of the world"
   dawn  morning 
   
3. an opening time period
   "it was the dawn of the Roman Empire"
   dawn 
   

1. become clear or enter one's consciousness or emotions
   "It dawned on him that she had betrayed him"; "she was penetrated with sorrow"
   click  get through  dawn  come home  get across  sink in  penetrate  fall into place 
   
2. become light
   "It started to dawn, and we had to get up"
   dawn 
   
3. appear or develop
   "The age of computers had dawned"
   dawn