Definition of "Sleep" :
noun: euphemisms for death (based on an analogy between lying in a bed and in a tomb)
"They had to put their family pet to sleep."
noun: a natural and periodic state of rest during which consciousness of the world is suspended
"He didn't get enough sleep last night."
noun: a torpid state resembling deep sleep
noun: a period of time spent sleeping
"He felt better after a little sleep."
verb: be asleep
verb: be able to accommodate for sleeping
"This tent sleeps six people."