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Sleep can be a noun or a verb. The past tense and -ed participle of the verb is slept.
Sleep is the natural state of rest in which you are unconscious with your eyes closed.
To sleep means to be in this state of rest.
If someone is in this state, you can use the progressive form and say they are sleeping, but it is more common to say that they are asleep. Don't say, for example, 'He sleeps'.
To say how long someone was in this state, or to talk about where or how someone usually sleeps, use sleep rather than asleep.
Asleep is only used after a verb. Don't use it in front of a noun. Don't, for example, say 'an asleep child'. Instead use sleeping.
Don't say that someone is 'very asleep' or 'completely asleep'. Instead say that they are sound asleep or fast asleep.
When someone changes from being awake to being asleep, you say that they go to sleep.
When someone goes to sleep suddenly or unexpectedly, you say that they fall asleep.
When someone goes to sleep with difficulty, for example because of noise or worries, you say that they get to sleep.
When someone goes to sleep again after being woken up, you say that they go back to sleep.
If something causes you to sleep, you say that it sends you to sleep.
|Adj.||1.||asleep - in a state of sleep; "were all asleep when the phone rang"; "fell asleep at the wheel"|
incognizant, unaware - (often followed by `of') not aware; "seemed unaware of the scrutiny"; "unaware of the danger they were in"; "unaware of the newborn hope"; "the most unaware person I've known"
unconscious - not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead; "lay unconscious on the floor"
awake - not in a state of sleep; completely conscious; "lay awake thinking about his new job"; "still not fully awake"
|2.||asleep - lacking sensation; "my foot is asleep"; "numb with cold"|
insensible - incapable of physical sensation; "insensible to pain"; "insensible earth"
|3.||asleep - dead; "he is deceased"; "our dear departed friend"|
euphemism - an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh
dead - no longer having or seeming to have or expecting to have life; "the nerve is dead"; "a dead pallor"; "he was marked as a dead man by the assassin"
|Adv.||1.||asleep - into a sleeping state; "he fell asleep"|
|2.||asleep - in the sleep of death|
asleep[əˈsliːp] adj → endormi(e)
to be asleep → dormir, être endormi(e)
He's asleep → Il dort.
to fall asleep → s'endormir
I fell asleep in front of the TV → Je me suis endormi devant la télé.
fast asleep, sound asleep → profondément endormi(e)
to be fast asleep, to be sound asleep → dormir à poings fermés