English

Noun

morning sleep ‎(usually uncountable, plural morning sleeps)

1. The second sleep of the night in a biphasic sleep pattern.
   • 2001, A. Roger Ekirch, Sleep We Have Lost: Pre-Industrial Slumber in the British Isles, The American Historical Review, Volume 106, Number 2 (April 2001), American Historical Association, pages 364–365:

     Until the close of the early modern era, Western Europeans on most evenings experienced two major intervals of sleep bridged by up to an hour or more of quiet wakefulness. […] The succeeding interval of slumber was called “second” or “morning” sleep.

Synonyms

• second sleep

Antonyms

• dead sleep