fast asleep (0 synonym found)

We don't have synonyms for fast asleep yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are fall asleep.

We don't have any synonyms for fast asleep yet.

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fall asleep

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Definition of fast asleep:

(adj) : (idiomatic) Sleeping, in a deep sleep.
Definition of fast asleep:

(adj) : (idiomatic) Sleeping, in a deep sleep.
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