Meaning of dead sleep | Babel Free

Definitions

1. A particularly sound sleep
   uncountable, usually
2. The first sleep of the night in a biphasic sleep pattern, before the watch.
   uncountable, usually

Equivalents

Examples

“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 initial interval of slumber was usually referred to as “first sleep⟳,” or, less often, “first nap” or “dead sleep⟳.””

CEFR level