Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
a sound sleep
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a sound sleep" is correct and usable in written English.
It can be used to describe a deep and restful sleep, often implying that the person is sleeping peacefully without disturbances. Example: "After a long day of hiking, I finally fell into a sound sleep and didn't wake up until morning."
✓ Grammatically correct
News & Media
Encyclopedias
Science
Wiki
Alternative expressions(2)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
40 human-written examples
It was a sound sleep.
News & Media
The first spasm woke her out of a sound sleep.
News & Media
Severe cramp in the calf of a leg can awaken people from a sound sleep.
Encyclopedias
"The waves were calm, so I went home and had a sound sleep," Mr. Ahmed said.
News & Media
Perhaps this is one reason I was able to have a sound sleep each night.
News & Media
Not long before we leave, I am awakened out of a sound sleep again, this time at midnight.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
17 human-written examples
He devotes 21 pages of his book to the attack, starting with being awakened "from a deep sound sleep" in the Olympic village and culminating in a lawsuit against the author and publisher of "The Blood of Israel" for being portrayed as "running away by jumping like a goat" in an attempt to escape.
News & Media
A good, sound sleep.
News & Media
Buy Now Verdict: Your guests may never leave if you wheel out the ultra-lux Jaybe Crown, but for novelty value, easy storage and a surprisingly sound sleep, the inflatable Aerobed gets our vote.
News & Media
When I wake up circa 7 a.m. after a long, sound sleep, I find I'm adjusted to the new time zone.
News & Media
His dog likes nothing better than to bust up a ball game, and will leap out of an apparently sound sleep to do s It usually takes the boy closer to 10 sec.
News & Media
Expert writing Tips
Best practice
Consider the context when choosing "a sound sleep" over alternatives. It's suitable when you want to emphasize both depth and tranquility.
Common error
Avoid using "a sound sleep" to simply indicate the length of sleep. Instead, highlight its restful and undisturbed qualities. Saying "I had a sound sleep for ten hours" is less effective than "I had a sound sleep, and I woke up feeling completely refreshed".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a sound sleep" functions as a noun phrase, typically serving as the object of a verb or preposition. It describes the quality of sleep, emphasizing its depth, tranquility, and restorative nature. Ludwig AI confirms its correctness and usability.
Frequent in
News & Media
75%
Wiki
10%
Encyclopedias
6%
Less common in
Science
6%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "a sound sleep" is a grammatically correct and commonly used noun phrase that describes a deep, restful, and undisturbed sleep. As Ludwig AI confirms, it's appropriate for various contexts, particularly in news and media. When using the phrase, focus on conveying the quality of sleep rather than just its duration. For alternative expressions, consider "a restful sleep" or "a deep sleep" to add a nuance of meaning.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
a restful sleep
Focuses on the rejuvenating aspect of sleep.
a deep sleep
Emphasizes the intensity and depth of sleep.
a peaceful sleep
Highlights the tranquility and lack of disturbance during sleep.
an undisturbed sleep
Stresses the absence of interruptions during sleep.
a good night's sleep
Refers to the sleep experienced during the entire night.
a rejuvenating sleep
Emphasizes the revitalizing effect of sleep.
a refreshing sleep
Highlights the invigorating nature of sleep.
a solid sleep
Similar to "sound sleep" but may suggest a slightly longer duration or uninterrupted period.
quality sleep
Focuses on the overall beneficial characteristics of sleep.
uninterrupted sleep
Emphasizes the lack of breaks or disturbances during sleep.
FAQs
How can I use "a sound sleep" in a sentence?
You can use "a sound sleep" to describe a restful and undisturbed sleep experience. For example, "After a long day of work, I finally had "a sound sleep" and woke up feeling refreshed."
What can I say instead of "a sound sleep"?
You can use alternatives like "a restful sleep", "a deep sleep", or "a peaceful sleep" depending on the context.
Which is correct, "a sound sleep" or "soundly asleep"?
"A sound sleep" is a noun phrase describing the sleep itself, while "soundly asleep" is an adverbial phrase describing the state of being asleep. Use "a sound sleep" when referring to the sleep experience, and "soundly asleep" when describing someone's state.
What's the difference between "a sound sleep" and "a good sleep"?
"A sound sleep" implies a deep, restful, and undisturbed sleep, emphasizing quality and tranquility. "A good sleep" is more general and simply suggests that the sleep was beneficial.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested