asleep

adj. sleeping, dozing, napping

Sleep is the state of natural rest observed throughout the animal kingdom, in all mammals and birds, and in many reptiles, amphibians, and fish.In humans, other mammals, and many other animals that have been studied — such as fish, birds, ants, and fruit-flies — regular sleep is necessary for survival. The capability for arousal from sleep is a protective mechanism and also necessary for health and survival.
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A·sleep adj. 1. In a state of sleep; sleeping. 2. Numb, as of a limb. 3. Dead. adv. 1. In or into a state of sleep. 2. [more]Asleep - Community and Resources

Adjective
1. in a state of sleep; "were all asleep when the phone rang"; "fell asleep at the wheel"
(synonym) asleep(p)
(antonym) awake(p)
(similar) at rest(a)
(see-also) unaware
2. lacking sensation; "my foot is asleep"; "numb with cold"
(synonym) asleep(p), benumbed, numb
(similar) insensible
3. dead; "he is deceased"; "our dear departed friend"
(synonym) asleep(p), at peace(p), at rest(p), deceased, departed, gone
(similar) dead
(classification) euphemism
Adverb
1. into a sleeping state; "he fell asleep"
(pertainym) asleep(p)
2. in the sleep of death
(pertainym) asleep(p), at peace(p), at rest(p), deceased, departed, gone

(a. & adv.)
Numbed, and, usually, tingling.
  

(a. & adv.)
In the sleep of the grave; dead.
  

(a. & adv.)
In a state of sleep; in sleep; dormant.