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