asleep Definition in the Cambridge English Dictionary
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Definition of “asleep” - English Dictionary

Definition of "asleep" - American English Dictionary

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asleepadjective [not gradable]

 us   /əˈslip/
sleeping or not ​awake: I ​fell asleep (= ​began to ​sleep) while ​watchingtelevision. I didn’t ​hear the ​phone – I was ​fast/​sound asleep (= ​sleeping and not ​easilywoken). If ​yourarm or ​leg is asleep, you have no ​feeling there because the ​flow of ​blood to that ​part has been ​reduced by being in the same ​position for too ​long.
(Definition of asleep from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "asleep" - British English Dictionary

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asleepadjective [after verb]

uk   us   /əˈsliːp/
B1 sleeping or not ​awake: I'm ​surprised to ​see you ​awake - ten ​minutes ago you were fast/​sound (= ​completely) asleep. I've only just got up and I'm still half asleep (= not ​completelyawake). If ​yourarm or ​leg is asleep, it cannot ​feel anything because it has been in the same ​position for so ​long.fall asleep to ​start to ​sleep: I ​fell asleep as ​soon as my ​headhit the ​pillow.
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(Definition of asleep from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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