sleep

(verb): To rest in a state of reduced consciousness.
(verb): (of a spinning top or yo-yo) To spin on its axis with no other perceptible motion.
(verb): To cause (a spinning top or yo-yo) to spin on its axis with no other perceptible motion.
(verb): To accommodate in beds.
(verb): To be slumbering in (a state).
(verb): To be careless, inattentive, or unconcerned; not to be vigilant; to live thoughtlessly.
(verb): To be dead; to lie in the grave.
(verb): To be, or appear to be, in repose; to be quiet; to be unemployed, unused, or unagitated; to rest; to lie dormant.
(verb): To wait for a period of time without performing any action.
(verb): To place into a state of hibernation.

You should sleep 8 hours a day.
This caravan can sleep four people comfortably.
to sleep a dreamless sleep
a question sleeps for the present; the law sleeps
After a failed connection attempt, the program sleeps for 5 seconds before trying again.