'Sunup' definitions:

Definition of 'sunup'

From: WordNet
noun
The first light of day; "we got up before dawn"; "they talked until morning" [syn: dawn, dawning, morning, aurora, first light, daybreak, break of day, break of the day, dayspring, sunrise, sunup, cockcrow] [ant: sundown, sunset]

Definition of 'Sunup'

From: GCIDE
  • Sunup \Sun"up`\, n. Sunrise. [Local, U.S.] [1913 Webster]
  • Such a horse as that might get over a good deal of ground atwixt sunup and sundown. --Cooper. [1913 Webster]

Synonyms of 'sunup'

From: Moby Thesaurus