the natural state of rest or the act of sleeping

to suffer from insomnia

to spend the winter in a dormant state; the biological state of inactivity and metabolic depression in animals during winter

to fall asleep

(euphemism) to rest eternally; to lie buried in one's final resting place

the use of hypnosis as a clinical or therapeutic treatment for physical or psychological conditions

referring to a state of suspended biological activity or growth in organisms such as plants or seeds

to sleep peacefully

a clinical condition characterized by persistent difficulty falling asleep or staying asleep, or poor quality sleep despite adequate opportunity.

without stopping to sleep or rest (idiom)

to stay awake all night

soporific drug; sleeping pill

to be unable to sleep at night

to sleep soundly; to be fast asleep

to pass away; to die; to rest eternally

Literally to sleep feet to feet; figuratively, to share a very close friendship.

literally "I'm drunk and would like to sleep"; an idiom used to describe a person's sincere, unpretentious, and straightforward nature

a silkworm's period of inactivity and fasting prior to molting

A sedative and hypnotic medication used to treat insomnia and as a sedative.

A benzodiazepine medication used to treat anxiety and alcohol withdrawal, commercially known as Librium.

to promote sleep

to have a sleepless night

self-hypnotism

(medicine) to be put into a medically induced sleep; to undergo sedation or anesthesia

sleep mode button (on the remote control of an air conditioner)

to hibernate

to catch up on sleep