Sunup refers to a natural phenomenon, ideal for contexts discussing the environment or outdoor activities. We'll need to pack up our campsite before sunup to catch the early trail.
Pro Tip 2/3
Time Reference
Use 'sunup' to indicate the start of activities or events planned at early morning hours. The fishing competition begins at sunup, so don’t be late.
Pro Tip 3/3
Figurative Use
'Sunup' can be used metaphorically to represent beginnings or the start of a new phase. High school graduation is like a sunup for your career.