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pre·dawn | \ ˌprē-ˈdȯn 
, -ˈdän \
, -ˈdän \variants:
or less commonly pre-dawn
Definition of predawn
: existing or occurring before dawn a predawn attack the predawn hours … the gigantic telescope started scanning the predawn sky.— Howard Blum
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Time Traveler for predawn
The first known use of predawn was in 1883
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