deep sleep

Meaning

1. (countable, uncountable) Used other than figuratively or idiomatically: see deep, sleep.
2. (countable, uncountable) stage 3 of non-rapid eye movement sleep
3. (countable, rare, uncountable) Artificially induced hibernation in humans for the purpose of long distance space travel.

Synonyms

sound sleep

torpor

sleep soundly

slow wave sleep

Translations

Tiefschlaf

sopor

تسبيخ

Lethargie

Schlaf im Frühjahr