1. sun up - Noun
2. sun up - Verb
(intransitive) to sunbathe; to soak up the sun
(intransitive) to become sunny or sunnier
sun-up (plural sun-ups)
Alternative form of sunup
sun-up
The sun was out, the sun was rising in the sky. Importantly the rooster strode across the floor, hopped up to a window sill, filled his chest, and crowed a mighty crow- to crow the sun up in the sky and sunlight into his busy hen house. Meindert DeJong
I always beat the sun up in the morning. It's the secret to why I'm double trouble. Al Sharpton