Definition of waker in English:

waker

Pronunciation /ˈwākər/ /ˈweɪkər/

noun

See wake

‘But soon the silent bliss was ended, as the sun slowly began its morning ascent, and the early wakers came to life.’
  • ‘Tashakawa suggested that David should be appointed as official lullaby maker at bedtime, and morning melody waker upper, flutewise.’