sun‧shine S3 [uncountable]
the light and heat that come from the sun when there is no cloud:
We had three days of spring sunshine.
Couples strolled in the afternoon sunshine.
She brought sunshine into our lives.
ray of sunshine (=a person or thing that makes you happy)
He was the only ray of sunshine in her life.
3 spoken informal
used when speaking to someone you are annoyed with:
Look, sunshine, I've had just about enough of you!