WordReference Random House Learner's Dictionary of American English © 2026
sun•up /ˈsʌnˌʌp/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- sunrise, esp. the time of sunrise:Meet us at sunup.
sun•up
(sun′up′),USA pronunciation n.
- sunrise, esp. the time of sunrise.
- sun + up, on the model of sundown 1705–15, American.