Synonym: beginning, commencement, daybreak, outset, start, sunrise. Antonym: dusk. Similar words: at dawn, far and away, lawn, pawn, spawn, fawning. Meaning: [dɔːn] 
n. 1. the first light of day 2. the earliest period 3. an opening time period. v. 1. become clear or enter one's consciousness or emotions 2. appear or develop 3. become light.
n. 1. the first light of day 2. the earliest period 3. an opening time period. v. 1. become clear or enter one's consciousness or emotions 2. appear or develop 3. become light. 
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1 The darkest hour is that before the dawn. 
2 The darkest hour is just before the dawn.
3 They start work at dawn.
4 He ordered the army to invade at dawn.
5 We must start at dawn.
6 Missile attacks on the capital resumed at dawn.
7 To watch the sunrise must wait till dawn.
8 Darkness falls; I'm calling for the dawn.
9 Harry held an umbrella over Dawn.
10 The dawn was filled with the sound of birds.
11 Dawn is well qualified for her new role.
12 The rooster crows at dawn.
13 However long the night,(www.Sentencedict.com) the dawn will break.
14 The infantry began to deploy at dawn.
15 We arrived in Sydney as dawn broke .
16 He always got up to greet the dawn.
17 Dawn and her boyfriend were cuddling on the sofa.
18 They recharged the enemy at dawn.
19 The soldiers went forward at dawn.
20 He works from dawn till dusk .
21 The cock crows and the dawn chorus begins.
22 The students went forward at dawn.
23 I woke up at dawn.
24 The first boats set off at dawn.
25 I woke up just before dawn.
26 In the cold dawn light, the castle looked stark and forbidding.
27 Time has traveled into fragmentary memories of the dawn and then melt into one wipe mist.
28 We were woken at dawn by a cock crowing repeatedly.
29 It is while you are patiently toiling at the little tasks of life that the meaning and shape of great whole of life dawn on you.
30 Thousands of pounds worth of drugs were seized in dawn raids yesterday.