- 1 [uncountable] the natural state of rest in which your eyes are closed, your body is not active, and your mind is not conscious I need to get some sleep. I didn't get much sleep last night. Can you give me something to help me get to sleep (= start sleeping)? Go to sleep—it's late. He cried out in his sleep. Anxiety can be caused by lack of sleep. His talk nearly sent me to sleep (= it was boring). Try to go back to sleep.
- 2 [singular] a period of sleep Did you have a good sleep? Ron fell into a deep sleep. I'll feel better after a good night's sleep (= a night when I sleep well).
- 3 [uncountable] (informal) the substance that sometimes forms in the corners of your eyes after you have been sleeping Ted rubbed the sleep from his eyes. Idioms
to be able to do something very easily because you have done it many times before I haven't done many portraits, but I could paint landscapes in my sleep.
be able to do something in your sleep(informal)jump to other results
if part of your body goes to sleep, you lose the sense of feeling in it, usually because it has been in the same position for too long My foot went to sleep.
go to sleep(informal)jump to other results
to not worry much about something It's not worth losing sleep over.
not lose sleep/lose no sleep over somethingjump to other results
to make someone unconscious before an operation by using drugs (called ananesthetic)
put somebody to sleep(informal)jump to other results
to kill a sick or injured animal by giving it drugs so that it dies without pain. People say‘put to sleep’to avoid saying‘kill.’
put something to sleepjump to other results