What does asleep mean?
Asleep describes the state of being in sleep — unconscious, resting, and unaware of one's surroundings. It is almost always used predicatively, following verbs like be, seem, or fall, as in 'the child was fast asleep'; it cannot directly precede a noun. Beyond its literal meaning, asleep carries two well-established figurative uses: a limb that has lost sensation from pressure is said to have 'fallen asleep', and something inactive or dormant — a quiet street, a neglected project, a sluggish market — may likewise be described as asleep. Writers adjust its intensity with adverbs such as fast, sound, deeply, or half, making it flexible across registers from casual conversation to literary prose. Derived from the Old English word for sleep, it remains one of the most common and versatile terms for describing both rest and stillness in modern English.
Sleeping; in a state of natural unconscious rest.
"The cat was curled up, completely asleep on the windowsill."
Predicative-only adjective; it must follow a verb rather than precede a noun.
(Of a limb or part of the body) Numb or without sensation, typically from sustained pressure.
"He shook his hand, trying to wake the fingers that had gone asleep."
(Figurative) Inactive, dormant, or showing no signs of activity.
"By midnight, the whole village lay asleep under a blanket of snow."
"Asleep" is one of the few English adjectives that can never stand before a noun — you can say "the asleep child"... actually you can't, which is exactly why grammar teachers love it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of asleep
Asleep comes from Old English, formed by attaching the prefix a- (from on) to slēap, the Old English ancestor of the modern word sleep. It has been used since the Middle English period to describe the state of sleeping. Its relatives — sleep, sleepy, sleepless, and related forms — all descend from the same Germanic root, which also gives cognates in other Germanic languages such as Dutch slapen and German schlafen.
How asleep is actually used
"Asleep" functions only predicatively — it follows a linking verb like be, fall, or drop, and cannot modify a noun directly (*an asleep child* is incorrect). Intensity is expressed through modifiers such as fast, sound, deeply, or half. The figurative sense of numbness in a limb is colloquial but fully established in both British and American English.