Definition of peep of day in US English:

peep of day


  • The first appearance of daylight, the earliest dawn. Also figurative. Now chiefly literary.


  • 1Of, relating to, or designating a Protestant organization active in the north of Ireland 1784–95, whose members clashed with Roman Catholic Defenders. Especially in "Peep o' Day Boys". Now historical.

  • 2Generally. Of, relating to, or active at the first appearance of daylight. Now rare.


Late 16th century; earliest use found in Abraham Fleming (c1552–1607), author, literary editor, and Church of England clergyman. From peep + of + day.


peep of day

/ˌpiːp əv ˈdeɪ/