noun
dawn; daybreak; first light of day
Literary or poetic term for the light at dawn. In everyday speech, 夜明け or 明け方 is more common.
東の空に曙光が差し始めた。
The first light of dawn began to appear in the eastern sky.
noun
first sign; glimmer of hope; prospects
Figurative use, often in the pattern 〜の曙光, meaning the first hopeful sign of something. Common in formal or literary contexts.
和平交渉にようやく曙光が見えてきた。
A glimmer of hope has finally appeared in the peace negotiations.