This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of sleep.

adj. asleep

adj. used for sleep; used to produce sleep.

n. the state or act of being asleep.

a. & n. from sleep.

n. The taking of rest in sleep; sleep; the state of one who sleeps; hence, lack of vigilance; remissness.

n. Inoperativeness; dormant state or condition; abeyance.

n. the state of being asleep

n. quiet and inactive restfulness

n. the suspension of consciousness and decrease in metabolic rate

adj. lying with head on paws as if sleeping

"I must draw the conclusion that _throughout our entire sleeping state we are just as certain that we are dreaming as we are certain that we are sleeping_."

unerect   

slumber    sleep   

sleeping of process   

sleep   

sleeping room    sleeping hours    Sleeping Beauty    sleeping pill    sleeping bag    sleeping car   

asleep    slumbering    dozing    dead    unwakeful    dormant    Dormition    incubation   

sleep   

beeping    bleeping    creeping    heaping    keeping    leaping    peeping    reaping    safekeeping    seeping