asleep /əˈsliːp/adjective 4phrases 4 adjective[after a verb]4 •not awake, and resting with the eyes closedI was asleep when you called.Never disturb a man asleep. •Having a numb or prickling sensation accompanied by a degree of unresponsiveness.My arm fell asleep. You know, like pins and needles. •(slang) Inattentive.How could you miss that? Were you asleep? •(euphemistic) Dead. Phrases with asleep asleep at the switchNeglectful of an important task, responsibility, or opportunity. dead asleepSleeping in a deep sleep fall asleepTo pass from a state of wakefulness into sleep. sound asleepSleeping still and silently.