break of day

: to separate into parts with suddenness or violence

: fracture

to fracture a bone of (a bodily part)

: an act or action of breaking

: the opening shot in a game of pool or billiards

: a gap or opening caused or appearing as if caused by damage : a condition produced by or as if by breaking : gap

: the time of light between one night and the next

: daylight

: daytime