Definition, Meaning & Synonyms
fast-asleep
adjective
/fæst əˈsliːp/

Definition
in a deep state of sleep; soundly sleeping.

Examples
- After the long journey, he was fast asleep on the couch.
- The baby fell fast asleep after her bedtime story.

Meaning
When someone is fast asleep, they are not easily awakened and are in a peaceful, restful state of sleep.

Synonyms
- Deeply asleep
- Sound asleep
- Asleep