1. the time in the morning when the sun appears or full daylight arrives: "an hour before sunrise"
▪ the colors and light visible in the sky on an occasion of the sun's first appearance in the morning, considered as a view or spectacle:"a spectacular sunrise over the summit of the mountain"
Instant at which the upper edge of the Sun appears over the eastern horizon in the morning
Sunrise is the moment when the upper rim of the Sun appears on the horizon in the morning. The term can also refer to the entire process of the solar disk crossing the horizon. Wikipedia