To emerge into daylight or to be exposed to natural light after being kept in darkness.
2.
general Englishneutralformal
To be made public, disclosed, published, or brought to public attention after having been hidden, withheld, or unpublished.
3.
general Englishinformalcolloquial
Used in negative or threatening contexts, to indicate that someone will not be allowed to appear in public or to survive, typically implying imprisonment, concealment, or death (as in 'never see the light of day').